Magnetic properties and electronic structure of the Heusler compounds Ru2-xFexCrSi

Hiroi, Masahiko; Rokkaku, Tsugumi; Mizutani, Sou; Fujii, Sinpei; Ishida, Shoji

doi:10.1088/1742-6596/150/4/042058

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…The sample with x = 1.0 shows non-metallic behavior in the entire temperature range and at low T the value of resistivity is increased. Similar semiconducting transport behavior has been reported in the Fe 2 VAl Heusler system and was attributed in that case to an enhancement of the mass of electrons due to spin fluctuations [20,25,32,33]. The room temperature resistivity values are comparable to the reported values for stoichiometric and Co-deficient ZrCo 2 Sn [17], and displayed in table 1.…”

Section: Resultssupporting

confidence: 85%

“…We get T c for the samples with x ⩾ 0.5, the sample with highest M s value has highest T c and it decreases linearly with the increase in x. The sample with x = 1.0 does not exhibit ferromagnetic transitions [15,17,25].…”

Section: Resultsmentioning

confidence: 92%

“…The sample with x = 1.0 shows a sharp peak at ~6 K, for clarity this is plotted in figure 3. The difference in zero-field cooled (ZFC) and field-cooled (FC) data, as shown in the inset of figure 3 may result from spin-glass transiton and which may be a consequence of the disordered state [24][25][26]. However, the exact magnetic state of these systems is not understood and warrants further investigation.…”

Section: Resultsmentioning

confidence: 99%

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Magnetic and electronic properties of the Cu-substituted Weyl semimetal candidate ZrCo₂Sn

Kushwaha

Wang

Kong

et al. 2018

J. Phys.: Condens. Matter

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We report that the partial substitution of Cu for Co has a significant impact on the magnetic properties of the Heusler-phase Weyl fermion candidate ZrCo2Sn. Polycrystalline samples of ZrCo2-xCuxSn (x = 0.0 to 1.0) exhibited a linearly decreasing ferromagnetic transition temperature and similarly decreasing saturated magnetic moment on increasing Cu substitution x. Materials with Cu contents near x = 1 and several other quaternary materials synthesized at the same x (ZrCoT'Sn (T' = Rh, Pd, Ni)) display what appears to be non-ferromagnetic magnetization behavior with spin glass characteristics. Electronic structure calculations suggest that the half-metallic nature of unsubstituted ZrCo2Sn is disrupted significantly by the Cu substitutions, leading to the breakdown of the magnetization vs. electron count guidelines usually followed by Heusler phases, and a more typical metallic non-spin-polarized electronic structure at high x.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

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Magnetic and electronic properties of the Cu-substituted Weyl semimetal candidate ZrCo₂Sn

Kushwaha

Wang

Kong

et al. 2018

J. Phys.: Condens. Matter

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“…Similar humps around T C in the ρ-T curves have been observed in many colossal magnetoresistance (CMR) materials (Ti 2 Mn 2 O 7 , HgCr 2 Se 4 ) and Heusler compounds (Fe 3 Si, Fe 2 Val, Ru 2 CrSi) [37][38][39][40][41][42][43][44]35]. In the CMR materials, the nanoscale phase separation or the formation of the magnetic polarons has been widely accepted as the origin of the resistivity hump around T C [37][38][39].…”

Section: Electronic Transport Propertiessupporting

confidence: 53%

Magnetic and transport properties of Zr_1−xNb_xCo₂Sn

Yang

et al. 2019

J. Phys.: Condens. Matter

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ZrCo2Sn is a potential candidate as a Weyl semimetal with a ferromagnetic ground state, and Nb-doping is expected to shift the Weyl points to the vicinity of Fermi level. We successfully synthesized a series of Zr1−xNbxCo2Sn single crystals with various concentrations of Nb (x = 0, 0.1, 0.2, 0.275, 0.4, 0.5). All samples have a spinel structure and the lattice constant decrease as the Nb doping level increases. The magnetization and transport measurements suggest that the ferromagnetic ordering temperature can be strongly modified by the Nb doping. When x increases, the Curie temperature decreases significantly, accompanied by a change from metal-like to semiconductor-like behavior. There is a crossover for positive to negative MR at a temperature between 30 K to 50 K. In constant, the magnitude of the anomalous Hall resistance increases monotonously with decreasing temperature.

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“…13 From a similar viewpoint Heusler compounds Ru 2−x Fe x CrSi were predicted to be complete or nearly complete HMs which are robust to chemical disorders by a first-principle band-structure calculation. 14,15 Motivated by the theoretical results we prepared a series of the Heusler compounds Ru 2−x Fe x CrSi. 16, 17 We previously reported that Ru 2−x Fe x CrSi is ferromagnetic for x Ն 0.5, and for x տ 1.5 its Curie temperature T C is much higher than room temperature.…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetism and spin-glass transitions in the Heusler compoundsRu2−xFexCrSi

et al. 2009

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The results of a comprehensive study of the structural, magnetic, and magnetotransport properties of the Heusler compounds Ru 2−x Fe x CrSi are presented. The Fe-rich compounds ͑x Ն 1.5͒ exhibit a usual ferromagnetic transition. The Ru-rich compound ͑x = 0.1͒ does not show ferromagnetism but exhibits a peak in magnetic susceptibility at T N ‫ء‬ = 30 K. Nevertheless, specific-heat measurements show that there is no antiferromagnetic transition at T N ‫ء‬ nor at any other temperatures. With further decreasing temperature strong irreversible behavior occurs below a temperature T g . It is proposed that these results can be interpreted as successive spin-glass transitions at T N ‫ء‬ and T g . The compounds with intermediate x ͑=0.3 and 0.5͒ are found to be ferromagnetic.Both the saturation magnetization and the Curie temperature T C increase with increasing x. However, being different from the Fe-rich compounds, hysteresis of the magnetization is observed and this suggests that the ferromagnetism has glassy character. In lower-temperature range fairly large negative magnetoresistance are observed. These results are suggestive of a magnetically inhomogeneous ferromagnetic state, that is, the formation of ferromagnetic clusters.

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Magnetic properties and electronic structure of the Heusler compounds Ru_2-xFe_xCrSi

Cited by 8 publications

References 10 publications

Magnetic and electronic properties of the Cu-substituted Weyl semimetal candidate ZrCo₂Sn

Magnetic and electronic properties of the Cu-substituted Weyl semimetal candidate ZrCo₂Sn

Magnetic and transport properties of Zr_1−xNb_xCo₂Sn

Ferromagnetism and spin-glass transitions in the Heusler compoundsRu2−xFexCrSi

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Magnetic properties and electronic structure of the Heusler compounds Ru2-xFexCrSi

Cited by 8 publications

References 10 publications

Magnetic and electronic properties of the Cu-substituted Weyl semimetal candidate ZrCo2Sn

Magnetic and electronic properties of the Cu-substituted Weyl semimetal candidate ZrCo2Sn

Magnetic and transport properties of Zr1−x Nb x Co2Sn

Ferromagnetism and spin-glass transitions in the Heusler compoundsRu2−xFexCrSi

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Product

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Magnetic properties and electronic structure of the Heusler compounds Ru_2-xFe_xCrSi

Magnetic and electronic properties of the Cu-substituted Weyl semimetal candidate ZrCo₂Sn

Magnetic and electronic properties of the Cu-substituted Weyl semimetal candidate ZrCo₂Sn

Magnetic and transport properties of Zr_1−xNb_xCo₂Sn