Investigation of Co2FeSi: The Heusler compound with highest Curie temperature and magnetic moment

Employing first-principle calculations, we investigated the influence of the impurity, Fe atom, on magnetism and electronic structures of Heusler compound Ti2CoSi, which is a spin gapless semiconductor (SGS). When the impurity, Fe atom, intervened, Ti2CoSi lost its SGS property. As TiA atoms (which locate at (0, 0, 0) site) are completely occupied by Fe, the compound converts to half-metallic ferromagnet (HMF) TiFeCoSi. During this SGS→HMF transition, the total magnetic moment linearly decreases as Fe concentration increases, following the Slate–Pauling rule well. When all Co atoms are substituted by Fe, the compound converts to nonmagnetic semiconductor Fe2TiSi. During this HMF→nonmagnetic semiconductor transition, when Fe concentration y ranges from y = 0.125 to y = 0.625, the magnetic moment of Fe atom is positive and linearly decreases, while those of impurity Fe and TiB (which locate at (0.25, 0.25, 0.25) site) are negative and linearly increase. When the impurity Fe concentration reaches up to y = 1, the magnetic moments of Ti, Fe, and Si return to zero, and the compound is a nonmagnetic semiconductor.

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Plasticity and magnetism in ordered alloys. Magnetic moment distribution and curie temperature.

Bulletin of the Japan Institute of Metals ◽

10.2320/materia1962.23.834 ◽

1984 ◽

Vol 23 (10) ◽

pp. 834-843

Author(s):

Seiki Takahashi

Keyword(s):

Curie Temperature ◽

Magnetic Moment ◽

Moment Distribution ◽

Ordered Alloys

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Magnetic properties of the non-stoichiometric TbCo2Nix alloys

EPJ Web of Conferences ◽

10.1051/epjconf/201818504021 ◽

2018 ◽

Vol 185 ◽

pp. 04021

Author(s):

Alexander Inishev ◽

Evgeny Gerasimov ◽

Nikolay Mushnikov ◽

Pavel Terentev ◽

Vasily Gaviko

Keyword(s):

Magnetic Properties ◽

Curie Temperature ◽

Concentration Dependence ◽

Magnetic Moment ◽

Magnetic Entropy Change ◽

Entropy Change ◽

Magnetic Entropy ◽

Thermodynamic Relation ◽

Temperature Dependences

The magnetic and magnetothermal properties of the non-stoichiometric TbCo2Nix (0 ≤ x ≤ 0.2) alloys were studied. It was found that the concentration dependence of the Curie temperature and magnetic moment of the 3d-sublattice have a maximum at x = 0.025. The obtained experimental magnetic properties of the TbCo2Nix alloys were discussed under assumption that the Co magnetic moment in the compounds changes with increasing x. The magnetic entropy change was determined using the temperature dependences of the magnetization and Maxwell’s thermodynamic relation. The obtained results for TbCo2Nix were compared with those for the ErCo2Mnx alloys.

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Magnetic Moment and Curie Temperature in Amorphous Co-R Alloys

IEEE Translation Journal on Magnetics in Japan ◽

10.1109/tjmj.1990.4564285 ◽

1990 ◽

Vol 5 (5) ◽

pp. 431-436 ◽

Cited By ~ 3

Author(s):

Yang Xing-Bo ◽

S. Ishio ◽

T. Miyazaki

Keyword(s):

Curie Temperature ◽

Magnetic Moment

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6.1.6 Magnetic moment, saturation magnetization, Curie temperature - Tables and Figures

Liquid-quenched Alloys - Landolt-Börnstein - Group III Condensed Matter ◽

10.1007/10013966_30 ◽

2005 ◽

pp. 87-87

Author(s):

S. Kobe ◽

A. R. Ferchmin

Keyword(s):

Curie Temperature ◽

Saturation Magnetization ◽

Magnetic Moment

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Ferromagnetic Ordering in the Thallide EuPdTl2

Zeitschrift für Naturforschung B ◽

10.1515/znb-2006-0207 ◽

2006 ◽

Vol 61 (2) ◽

pp. 159-163 ◽

Cited By ~ 5

Author(s):

Rainer Kraft ◽

Sudhindra Rayaprol ◽

C. Peter Sebastian ◽

Rainer Pöttgen

Keyword(s):

Curie Temperature ◽

Single Crystals ◽

Magnetic Moment ◽

Three Dimensional ◽

X Ray Diffraction ◽

Zintl Phase ◽

X Ray ◽

Divalent Europium ◽

Ferromagnetic Ordering

AbstractThe new thallide EuPdTl2, synthesized from the elements in a sealed tantalum tube in a highfrequency furnace, was investigated by X-ray diffraction on powders and single crystals: MgCuAl2 type, Cmcm, Z = 4, a = 446.6(1), b = 1076.7(2), c = 812.0(2) pm, wR2 = 0.0632, 336 F2 values, 16 variables. The structure can be considered as an orthorhombically distorted, palladium-filled variant of the binary Zintl phase EuTl2. The palladium and thallium atoms build up a three-dimensional [PdTl2] polyanion with significant Pd-Tl (286 - 287 pm) and Tl-Tl (323 - 329 pm) interactions. The europium atoms fill distorted hexagonal channels of the [PdTl2] polyanion. Susceptibility measurements show a magnetic moment of 7.46(5) μB/Eu atom, indicative of divalent europium. EuPdTl2 is a soft ferromagnet with a Curie temperature of TC = 12.5(5) K.

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Magnetic Transitions in the Double Perovskite Sr2FeRe1-xFexO6(0≤X≤0.5)

MRS Proceedings ◽

10.1557/proc-1119-l05-07 ◽

2008 ◽

Vol 1119 ◽

Author(s):

Haitao Gao ◽

Vadim Ksenofotov ◽

Joachim Barth ◽

Martin Panthöefer ◽

Felser Claudia ◽

...

Keyword(s):

Curie Temperature ◽

Transport Properties ◽

Solid Solutions ◽

Magnetic Moment ◽

Parent Compound ◽

Structural Evolution ◽

Double Perovskite ◽

Magnetic Transitions ◽

Mössbauer Data ◽

Redox Buffer

AbstractThe synthesis, structure, and magnetic and transport properties of solid solutions Sr2FeRe1-xFexO6 (0≤x≤0.5) are reported. A structural evolution in the solid solutions from a double perovskite to perovskite is observed with increasing Fe/Re disorder. Except for the metallic parent compound all members of the series are semiconducting. For the Fe-doped samples a change from ferrimagnetic interactions in the parent compound to a complex superposition of ferrimagnetic and antiferromagnetic interactions was observed. The magnetic moment decreases with x, whereas the Curie temperature TC remains unaffected. The magnetic and Mössbauer data suggest Fe to act as a redox-buffer.

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