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

2006 ◽  
Vol 88 (3) ◽  
pp. 032503 ◽  
Author(s):  
Sabine Wurmehl ◽  
Gerhard H. Fecher ◽  
Hem Chandra Kandpal ◽  
Vadim Ksenofontov ◽  
Claudia Felser ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Magnetic Moment ◽  
Heusler Compound

scholarly journals Spin Gapless Semiconductor–Nonmagnetic Semiconductor Transitions in Fe-Doped Ti2CoSi: First-Principle Calculations

2018 ◽  
Vol 8 (11) ◽  
pp. 2200 ◽  
Author(s):  
Yu Feng ◽  
Zhou Cui ◽  
Ming-sheng Wei ◽  
Bo Wu ◽  
Sikander Azam
Keyword(s):  
Magnetic Moment ◽  
Electronic Structures ◽  
Magnetic Moments ◽  
Total Magnetic Moment ◽  
First Principle ◽  
Half Metallic ◽  
Heusler Compound ◽  
First Principle Calculations ◽  
Metallic Ferromagnet

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.

scholarly journals Magnetic properties of the non-stoichiometric TbCo2Nix alloys

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.

Magnetic Moment and Curie Temperature in Amorphous Co-R Alloys

1990 ◽  
Vol 5 (5) ◽  
pp. 431-436 ◽  
Author(s):  
Yang Xing-Bo ◽  
S. Ishio ◽  
T. Miyazaki
Keyword(s):  
Curie Temperature ◽  
Magnetic Moment

Ferromagnetic Ordering in the Thallide EuPdTl2

2006 ◽  
Vol 61 (2) ◽  
pp. 159-163 ◽  
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.

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

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.

Ferromagnetism in Co doped CeO2: Observation of a giant magnetic moment with a high Curie temperature

2006 ◽  
Vol 88 (14) ◽  
pp. 142511 ◽  
Author(s):  
Ashutosh Tiwari ◽  
V. M. Bhosle ◽  
S. Ramachandran ◽  
N. Sudhakar ◽  
J. Narayan ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Magnetic Moment ◽  
High Curie Temperature ◽  
Doped Ceo2 ◽  
Giant Magnetic Moment ◽  
Co Doped
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