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We investigate the magnetocrystalline anisotropy (MCA) energy of tetragonal distorted FeCo alloys depending on the degree of order by first-principles electronic structure calculation combined with the coherent potential approximation. The…

Materials Science · Physics 2012-11-06 Yohei Kota , Akimasa Sakuma

The ground state of the simple Heisenberg nearest-neighbor quantum kagome antiferromagnetic model is a magnetically disordered spin liquid, yet various perturbations may lead to fundamentally different states. Here we disclose the origin of…

Strongly Correlated Electrons · Physics 2020-07-10 T. Arh , M. Gomilšek , P. Prelovšek , M. Pregelj , M. Klanjšek , A. Ozarowski , S. J. Clark , T. Lancaster , W. Sun , J. -X. Mi , A. Zorko

We present a novel finite-temperature second-order perturbation method incorporating spin-orbit coupling to investigate the temperature-dependent site-resolved contributions to the magnetocrystalline anisotropy energy (MAE), specifically…

Materials Science · Physics 2023-08-23 Shogo Yamashita , Akimasa Sakuma

We report on a study on a representative set of Fe$_{2}$P-based MnFePSi samples by means of $^{55}$Mn NMR in both zero and applied magnetic field. The first-order nature of the magnetic transition is demonstrated by truncated order…

Strongly Correlated Electrons · Physics 2019-04-29 R. Hussain , F. Cugini , S. Baldini , G. Porcari , N. Sarzi Amadè , X. F. Miao , N. H. van Dijk , E. Brück , M. Solzi , R. De Renzi , G. Allodi

Resonant x-ray scattering at the Dy $M_5$ and Ni $L_3$ absorption edges was used to probe the temperature and magnetic field dependence of magnetic order in epitaxial LaNiO$_3$-DyScO$_3$ superlattices. For superlattices with 2 unit cell…

Strongly Correlated Electrons · Physics 2017-06-07 M. Bluschke , A. Frano , E. Schierle , M. Minola , M. Hepting , G. Christiani , G. Logvenov , E. Weschke , E. Benckiser , B. Keimer

We study the effect that size disorder in the cations surrounding manganese ions has on the magnetic properties of manganites. This disorder is mimic with a proper distribution of spatially disordered Manganese energies. Both, the Curie…

Materials Science · Physics 2009-11-11 J. Salafranca , L. Brey

The first order magneto-structural transition ($T_t\simeq95$ K) and magnetocaloric effect in MnNiGe$_{0.9}$Ga$_{0.1}$ are studied via powder x-ray diffraction and magnetization measurements. Temperature dependent x-ray diffraction…

Materials Science · Physics 2018-01-17 Pallab Bag , R. Nath

We report on the synthesis and structural characterization of the magnetocaloric FeMnP$_{0.75}$Si$_{0.25}$ compound. Two types of samples (as quenched and annealed) were synthesized and characterized structurally and magnetically. We have…

Quantum-classical escape-rate transition has been studied for two general forms of magnetic anisotropy in ferrimagnetic or antiferromagnetic particles. It is found that the range of the first-order transition is greatly reduced as the…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 Gwang-Hee Kim

The interplay between magnetism and strong electron correlation in magnetic materials discerns a variety of intriguing topological features. Here, we report a systematic investigation of the magnetic, thermodynamic, and electrical transport…

Mesoscale and Nanoscale Physics · Physics 2024-09-11 Anyesh Saraswati , Sudipta Chatterjee , Nitesh Kumar

The structural and magnetic properties of functional Ni-Mn-Z (Z = Ga, In, Sn) Heusler alloys are studied by first-principles and Monte Carlo methods. The \textit{ab initio} calculations give a basic understanding of the underlying physics…

We report the first results of time-dependent density functional simulations of magnetic properties of Fe and Ni at finite temperatures. They reveal the existence of local moments in Ni above the Curie temperature, coupled to strong short…

Materials Science · Physics 2007-05-23 Vladimir Antropov

Polycrystalline samples of the Y-diluted antiferromagnet CeNiGe3 (T_N = 5.5 K) and Th-diluted ferromagnet UNiSi2 (T_C = 95 K) were studied by means of x-ray powder diffraction, magnetization and specific heat measurements performed in a…

Strongly Correlated Electrons · Physics 2012-06-21 Adam P. Pikul

The strong perpendicular magnetic anisotropy of $L{\rm1_0}$-ordered FePt has been the subject of extensive studies for a long time. However, it is not known which element, Fe or Pt, mainly contributes to the magnetic anisotropy energy…

Strained Fe-Co films have recently been demonstrated to exhibit a large magnetocrystalline anisotropy (MCA) and thus to be of potential interest as magnetic storage material. Here, we show by means of density-functional (DF) calculations,…

Materials Science · Physics 2015-05-27 Carsten Neise , Stephan Schönecker , Manuel Richter , Klaus Koepernik , Helmut Eschrig

We present here a comprehensive investigation of the magnetic ordering in Ni50Mn35In15 composition. A concomitant first order martensitic transition and the magnetic ordering occurring in this off-stoichiometric Heusler compound at room…

Materials Science · Physics 2009-11-13 P. A. Bhobe , K. R. Priolkar , A. K. Nigam

The interplay of lattice, electronic, and spin degrees of freedom at epitaxial complex oxide interfaces provides a route to tune their magnetic ground states. Unraveling the competing contributions is critical for tuning their functional…

Materials Science · Physics 2024-03-07 Xuanyi Zhang , Athby Al-Tawhid , Padraic Schafer , Zhan Zhang , Divine P. Kumah

The magnetic response of nanostructures plays an important role on biomedical applications being strongly influenced by the magnetic anisotropy. In this work we investigate the role of temperature, particle concentration and nanoparticle…

Applied Physics · Physics 2019-02-20 V. R. R. Aquino , L. C. Figueiredo , J. A. H. Coaquira , M. H. Sousa , A. F. Bakuzis

The electronic, magnetic, and thermodynamic properties of ordered and chemically disordered FeRh alloy is studied using ab-initio methods. The equiatomic Fe$_{50}$Rh$_{50}$ composition is reported for both ordered and disordered phases.…

Materials Science · Physics 2022-08-01 Greeshma R , Rudra Banerjee

HoNiSi$_{3}$ is an intermetallic compound characterized by two successive antiferromagnetic transitions at $T_{N1} = 6.3$ K and $T_{N2} = 10.4$ K. Here, its zero-field microscopic magnetic structure is inferred from resonant x-ray magnetic…