• Full and broken lines represent first- and second-order phase transitions, respectively, between ferromagnetic (F) and paramagnetic (P) phases. (ioffe.ru)
  • The broken line corresponds to k F = 0.2 nm -1 , in this case there is a first-order transition between the x = 1 ferromagnetic phase and the paramagnetic phase. (ioffe.ru)
  • 3.0ξs, the paramagnetic phase transition is always of the second order, in contrast to the first-order transition in thinner samples at low temperatures. (jyu.fi)
  • The combined potential energy surface yields excellent agreement with first-principles magneto-elastic calculations and quantitative predictions of diverse materials properties including bulk modulus, magnetization, and specific heat across the ferromagnetic-paramagnetic phase transition. (sandia.gov)
  • All compounds exhibit ferromagnetic - paramagnetic phase transitions. (edu.vn)
  • 0$, namely, $\mathcal{P}\mathcal{T}$-symmetry broken antiferromagnetic state and $\mathcal{P}\mathcal{T}$-symmetry preserved paramagnetic state, and the quantum phase transition line between them is the line of exception points. (arxiv.org)
  • Recent results establish for the hard-core model (and more generally for 2-spin antiferromagnetic systems) that the computational complexity of approximating the partition function on graphs of maximum degree D undergoes a phase transition that coincides with the uniqueness/non-uniqueness phase transition on the infinite D-regular tree. (dagstuhl.de)
  • It has the highest magnetic ordering temperature of 507 K observed in magnetic MAX phases so far, and the spin structure is driven by competing ferromagnetic and antiferromagnetic interactions. (uni-due.de)
  • Despite the similarity, we find that the details of the transitions, for example, the temperature difference between the structural and antiferromagnetic transition temperatures and the incommensurability of the antiferromangetic peaks, are different between Ba(Fe 1-x-y Co x Rh y ) 2 As 2 and Ba(Fe 1-x Co x ) 2 As 2 compounds. (osti.gov)
  • Figure 1: Ferromagnetic phase transition with easy-axis anisotropy between the spin-unpolarized and fully spin-polarized 2/3 fractional quantum Hall states. (nature.com)
  • Spin Glass-Ferromagnetic Phase Transition in Amorphous (Fe x Ni 1-x ) .75 P .16 B .06 Al .03 , J. W. Lynn, R. W. Erwin, J. J. Rhyne and H. S. Chen, J. Appl. (nist.gov)
  • Ferromagnetic and Spin Glass Behavior Near the Critical Concentration in Amorphous (Fe x Ni 1-x ) 75 Glass 25 , J. W. Lynn, R. W. Erwin, J. J. Rhyne and H. S. Chen, J. Mag. (nist.gov)
  • Amongst the utilized fundamental effects is spin pumping where a precessing magnetization of a ferromagnet being at ferromagnetic resonance (FMR) transfers angular momentum to an adjacent nonferromagnetic layer [2], i.e. spin current. (avssymposium.org)
  • Exploiting the entanglement concept within a matrix-product-state based infinite density-matrix renormalization group approach, we show that the spin-density-wave and bond-order-wave ground states of the one-dimensional half-filled extended Hubbard model give way to a symmetry-protected topological Haldane state in case an additional alternating ferromagnetic spin interaction is added. (arxiv.org)
  • Increasing the ratio between nearest-neighbor and local Coulomb interaction $V/U$, the enhancement of the entanglement entropy, the variation of the charge, spin and neutral gaps, and the dynamical spin/density response signal a quantum phase transition to a charge-ordered state. (arxiv.org)
  • We present a theoretical study of quantum phases and quantum phase transitions occurring in non-Hermitian $\mathcal{P}\mathcal{T}$-symmetric superconducting qubits chains described by a transverse-field Ising spin model. (arxiv.org)
  • Up to now, probing the quantum phase transition (QPT) and quantum critical (QC) phenomena at finite temperatures in one-dimensional (1D) spin systems still lacks an in-depth understanding. (frontiersin.org)
  • Up to the critical field B c = J (1+∆)/ gμ B , a QPT occurs from TLL to a spin polarized ferromagnetic (FM) state with an excitation gap opened up by the field [ 14 ]. (frontiersin.org)
  • We improve this hardness result by establishing it for bipartite graphs of maximum degree D. To this end, we first present a detailed picture for the phase diagram for the infinite D-regular tree, giving a refined picture of its first-order phase transition and establishing the critical temperature for the coexistence of the disordered and ordered phases. (dagstuhl.de)
  • We determine the superconducting transition temperature, the temperature dependence of the resistivity, and the phase diagram. (aps.org)
  • Phase diagram of a DMS quantum well, using the parameters described in the text. (ioffe.ru)
  • Phase diagram of a DMS quantum well as a function of T and magnetic field for a hole density such that k F = 0.2 nm -1 . (ioffe.ru)
  • In this diagram, ferromagnetic phase transition is shown in a gas of fermions in a periodic crystal (top, shown in blue) and in a gas without a crystalline structure (bottom). (mit.edu)
  • A scaling procedure for the coherence length $\xi$ allows us to establish a complete quantum phase diagram of the system. (arxiv.org)
  • 1$. We also provide the qualitative quantum phase diagram $\gamma-J$ derived in the framework of the Bethe-Peierls approximation that is in a good accord with numerically obtained results. (arxiv.org)
  • The quantum phase diagram is renormalized by the anisotropy (∆), which manifests a quantum critical point (QCP) h c = 1 + ∆ signaling the transition from gapless Tomonaga-Luttinger liquid (TLL) to gapped ferromagnetic (FM) state, demonstrated by the magnetic entropy and thermal Drude weight. (frontiersin.org)
  • Examples of studies range from in-situ investigation of the magnetism of isolated atoms or single molecules, to the properties of oxide materials in thin-film or bulk crystal form, topological insulators, or hybrid ferromagnetic -2D materials such as Graphene. (lu.se)
  • We find that the overall behaviors of Ba(Fe 1-x-y Co x Rh y ) 2 As 2 and Ba(Fe 1-x Co x ) 2 As 2 compounds are very similar when the total number of extra electrons per Fe/TM (TM=transition metal) site is considered, which is consistent with the rigid band model. (osti.gov)
  • In the past, the group 12 elements zinc (Zn), cadmium (Cd), and mercury (Hg), that are included in the "d-block" of the periodic table, have been considered as transition elements, but they are nowadays rarely considered as such, because their compounds lack some of the properties that are characteristic for transition elements. (citizendium.org)
  • Because scandium (Sc), yttrium (Y), and lanthanum (La) actually do not form compounds analogous to those of the other transition elements and because their chemistry is quite homologous to that of the lanthanoids (previously known as lanthanides), they are often excluded from the group of transition elements. (citizendium.org)
  • Rev. B 90, 184422 (2014)] for the magnetic Mott insulator Ba2NaOsO6 have proposed a low-temperature order parameter that breaks lattice rotational symmetry without breaking time reversal symmetry, leading to a nematic phase just above the magnetic ordering temperature. (su.se)
  • We demonstrate that diffusion and localization effects drastically modify the interplay between fermionic incoherence and strong pairing interactions leading to a possible strong enhancement of superconductivity, eventually followed by the superconductor-insulator transition. (aps.org)
  • Three-dimensional quasiquantized Hall insulator phase in SrSi 2 . (mpg.de)
  • Above this point, the transition between the Haldane insulator and charge-density-wave phases becomes first order. (arxiv.org)
  • The compound with Y atoms at the cluster center has a slightly higher transition temperature with a sharper step in the specific heat than the compound with tetrahedral units. (su.se)
  • We present high-resolution calorimetric and magnetization data of the same Ba2NaOsO6 single crystal and show evidence for a weakly field-dependent phase transition occurring at a temperature of T-s approximate to 9.5 K, above the magnetic ordering temperature of T-c approximate to 7.5 K. This transition appears as a broadened step in the low-field temperature dependence of the specific heat. (su.se)
  • We then prove for all temperatures below this critical temperature (corresponding to the region where the ordered phase 'dominates') that it is #BIS-hard to approximate the partition function on bipartite graphs of maximum degree D. The #BIS-hardness result uses random bipartite regular graphs as a gadget in the reduction. (dagstuhl.de)
  • Ferromagnetic materials are those that, below a specific temperature, are strongly magnetized even in the absence of a magnetic field. (mit.edu)
  • The substitution also increases the range of temperature and field where the skyrmion phase is stable due to a change in the character of the magnetism. (lsu.edu)
  • Possible magnetic correlation above the ferromagnetic phase transition temperature in Cr 2 Ge 2 Te 6 . (bvsalud.org)
  • A quantum phase transition (QPT) takes place at zero temperature, as a result of the quantum fluctuations arising from Heisenberg uncertainty relation [ 1 ]. (frontiersin.org)
  • Neutron Scattering Studies of Phase Transitions in Superconductors, J. W. Lynn, J. Less Comm. (nist.gov)
  • Chromium and manganese are the cut-off elements when transitioning through the 3d metals that still form stable full and doped MAX phases, respectively. (uni-due.de)
  • They range from commensurate insulators (at filling factors 1/2, 1/4 and 3/4) to metals with strongly interacting conduction electrons (close to these three special cases) to an exotic phase of a helical metal. (osti.gov)
  • The most striking similarities shared by the transition elements is that they are all metals-which is why they are often called transition metals -and that most of them are hard, strong, and lustrous. (citizendium.org)
  • For the first time, MIT scientists have observed ferromagnetic behavior in an atomic gas, addressing a decades-old question of whether it is possible for a gas to show properties similar to a magnet made of iron or nickel. (mit.edu)
  • Ferromagnetic insulators (FI) can induce a strong exchange field in an adjacent superconductor (S) via the magnetic proximity effect. (jyu.fi)
  • Formation of an Oscillatory Magnetization Near the Reentrant Superconducting Transition in HoMo 6 S 8 , J. W. Lynn, R. Pynn, J. Joffrin, and J. L. Ragazzoni, Physica 108B , 801 (1981). (nist.gov)
  • Using this method, we investigated dynamical aspects of the inversion of the magnetization in thin ferromagnetic films with stripe domains. (lu.se)
  • All liquid or gaseous fermion systems in nature don't have strong enough interactions to become ferromagnetic," explains physics graduate student Gyu-Boong Jo, a member of the research team. (mit.edu)
  • The presence of competing interactions (that often have a comparable energy scale) leads to presence of variety of phases in the manganites that can be tuned by substitution (hole concentration), pressure and magnetic field. (aps.org)
  • We performed a comprehensive suite of studies exploring magnetic phase transitions, structural transformations, electrical transport and magnetic properties in the Mn 2 GaC MAX phase. (uni-due.de)
  • The anion vacancies in the resulting phase with composition RbO(1.72) provide greater structural flexibility compared to RbO(2) and facilitate a Jahn-Teller-driven order-disorder transition involving the anion orientations at similar to 230 K, below which their axes become confined to a plane. (rug.nl)
  • The structural changes (as established through the above studies) on size reduction tend to enhance the ferromagnetic interaction in the system. (aps.org)
  • We demonstrate the efficacy of our data-driven framework across magneto-structural phase transitions by generating a magneto-elastic ML-IAP for α-iron. (sandia.gov)
  • This is a powerful insight into how chemical composition couples with electronic structure and the resulting bulk magnetic properties because it provides crucial guidelines to produce long-range ordered magnetic MAX phases. (uni-due.de)
  • The incomplete electronic d subshell gives rise to some characteristic magnetic properties ( paramagnetism and ferromagnetism ) and crystals and solutions of transition metal complexes that are brightly colored. (citizendium.org)
  • An influence of a local anisotropy of random orientation on a ferromagnetic phase transition is studied. (lviv.ua)
  • Particular focus is on superconductivity, magnetism, and other systems with electronic phase transitions, where the effects of a magnetic field and field direction are central. (su.se)
  • MAX phases - in general are atomically layered composites with unique properties ranging from spectacular mechanical properties to self-healing and superconductivity. (uni-due.de)
  • If the Al film in contact with the EuS is thinner than a certain critical value, we do not observe superconductivity, whereas, in thicker samples, we find evidence of a first-order phase transition induced by an external field. (jyu.fi)
  • I wil discuss our use of coherent X-ray scattering in the stripe and skyrmion phase to obtain speckle patterns that can be used to determine domain cascades and avalanches. (lu.se)
  • Using existing framework of statistical mechanics we were able to extract scaling laws for the avalanches in the stripe and skyrmion phases. (lu.se)
  • We study the influence of disorder on the superconducting transition in a two-dimensional Fermi liquid coupled to the soft Ising-ferromagnetic order-parameter fluctuations associated with proximity to a quantum critical point. (aps.org)
  • Ferromagnetic imprinting of nuclear spins in semiconductors. (nature.com)
  • Therefore, other strategies to induce long-range magnetic ordering in bulk MAX phases are necessary to open the path to new functional materials. (uni-due.de)
  • MAX phases that exhibit long-range magnetic order in the bulk are still very hard to synthesize. (uni-due.de)
  • Loki Incorporated, Rolla, MO 65409, U.S.A. "Explosive-driven mini-system based on shock wave ferromagnetic seed source and loop magnetic flux compression generator" Archived 2010-06-29 at the Wayback Machine Welcome to IEEE Xplore 2.0: Completely Explosive Autonomous High-Voltage Pulsed-Power System Based on Shockwave Ferromagnetic Primary Power Source and Spiral Vector Inversion Generator. (wikipedia.org)
  • The line separating the fully polarized from the partially polarized system represents a first-order transition. (ioffe.ru)
  • Usually, it manifests that the ground state of a quantum system changes upon tuning an external nonthermal parameter such as pressure or magnetic field to a critical value, which is marked by a quantum critical point (QCP) for a continuous transition. (frontiersin.org)
  • The evolution of the phase boundary with applied magnetic field suggests that this phase coincides with the phase of broken local point symmetry seen in NMR experiments at high fields [L. Lu et al. (su.se)
  • Furthermore, the magnetic field dependence of the specific heat provides clear indications for magnetic correlations persisting at temperatures between T-c and T-s where long-range magnetic order is absent, giving support for the existence of the proposed nematic phase. (su.se)
  • Both the experimental and theoretical/ab initio magnetic analysis confirm that the solid-solution (V 1- x Cr x ) 2 GaC is an itinerant Pauli paramagnet, that almost fulfils the Stoner criterion for ferromagnetic order (for compositions with x around 0.80). (uni-due.de)
  • Tests for Time-Reversal Symmetry Breaking below the Charge-Order Transition. (mpg.de)
  • Clearly, in order to cancel the QCD vacuum contribution, QCD, formed during the QCD phase transition epoch, a positive contribution to the vacuum energy density should be formed at the same QCD energy scale QCD. (lu.se)
  • 6. define and explain the concepts of phase transition and order parameter, and give examples from the mean field treatment of ferromagnetism. (lu.se)
  • This and other observations agreed with theoretical predictions for a phase transition to a ferromagnetic state. (mit.edu)
  • A transition element is a chemical element whose atomic electron configuration of the ground (lowest energy) state has an incompletely filled d sub-shell. (citizendium.org)
  • The electron configuration of transition element atoms contains the orbital occupancy ( nd ) k , 1 ≤ k ≤ 9, where n is the principal quantum number of the d -orbital. (citizendium.org)
  • In Table II, taken from NIST , [1] it is shown that neutral transition element atoms also have one or two electrons in an s orbital with principal quantum number one higher than that of the partially filled d sub-shell. (citizendium.org)
  • A strict application of the definition would describe also lutetium (Lu) as a transition element as it has a singly occupied 5 d orbital in its ground state. (citizendium.org)
  • An iron-based (on the M -site) bulk MAX phase does not exist. (uni-due.de)
  • This will include destabilization of the charge ordered state, change in the nature of the ferromagnetic transition and non-linear conduction that arises in the nanostructured films due to presence of a large number of grain boundaries. (aps.org)
  • 3. describe the approach to the equilibrium state in terms of phase space concepts, reversibility and irreversibility. (lu.se)
  • Zero-Field Nernst Effect in a Ferromagnetic Kagome-Lattice Weyl-Semimetal Co 3 Sn 2 S 2 . (mpg.de)
  • For the ferromagnetic Potts model we investigate whether analogous hardness results hold. (dagstuhl.de)
  • When they gradually increased the repulsive forces between the atoms, they observed several features indicating that the gas had become ferromagnetic. (mit.edu)
  • We thereby prepare squeezed states of N=200 atoms with a metrological squeezing parameter ξ^{2}=0.77(9) quantifying the reduction in phase variance below the standard quantum limit. (stanford.edu)
  • We have worked on determining the magnetic structures and the nature of the phase transitions in a wide variety of materials. (nist.gov)
  • It appears most commonly as a positive ion without d -electrons in the valence shell and without the characteristic properties of a transition element. (citizendium.org)
  • The physical properties of the nanostructured manganites are very distinct and different from that seen in related nanostructured transition metal ferromagnetic oxides like the cobaltates. (aps.org)
  • An exemplar is a fer- romagnetic material like iron, while familiar and widely used, we lack a simulation capability to characterize the interplay of structure and magnetic effects that govern material strength, ki- netics of phase transitions and other transport properties. (sandia.gov)
  • The gluon condensate directly influences properties of the quark-gluon plasma and its hadronisation, as well as dynamics of the QCD phase transition. (lu.se)
  • Figure 4: Time progression of the ferromagnetic phase transition. (nature.com)
  • The research showed that polyoxyethylene (20) sorbitan monooleate (Tween 80) can be incorporated into the gel-like phase formed by L-α-phosphatidylcholine (PC) and dioctyl sulfosuccinate sodium salt (DOSS) for potential application as a gel-like dispersant for oil spill treatment. (lsu.edu)
  • 1 ( x = 0.20, 0.40, 0.50, 0.60, 0.80) forms almost single phase with minimal differences in their morphology. (uni-due.de)
  • Diffuse scattering due to coherent X-rays give rise to speckle pattern due to interference of scattered wave fronts that are randomly phase shifted by the morphology of the sample. (lu.se)
  • We present a first-ever comprehensive analytical theory of such KL at an arbitrary doping and predict a variety of regimes with different electronic phases. (osti.gov)