New magnetic semiconductors Fe1−Cr2(1−)Sn2S4

Koroleva, L. I.; Kessler, Ya.A.; Lukina, L. N.; Virovets, T. V.

doi:10.1016/0304-8853(95)00963-9

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…The temperature dependence of the paramagnetic susceptibility of all listed compounds obeys Curie-Weiss law with the paramagnetic Curie temperatures θ, represented in Table . As illustrated in Fig. 1, in the LaMnO 3-y compounds a not great maximum is observed on the M(T) curve around T = 132 K, coincided with the Neel temperature of LaMnO 3 [3] that evidences of an antiferromagnetic (AF) phase presence. The M(T) dependence in the rest of the T-region obeys a next relation:…”

Section: Resultsmentioning

confidence: 75%

Influence of Oxigen Deficiency on Magnetic, Magnetoresistive and Magnetoelastic Properties of La1-xSrxMnO3-y Manganites

Zashchirinskii

Koroleva

Khapaeva

et al. 2009

SSP

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The influence of oxygen deficiency on magnetization, paramagnetic susceptibility, electrical resistivity, magnetoresistance and magnetostriction of La1-xSrxMnO3-y (x = 0, 0.2, 0.4; y = 0, 0.13, 0.2) is studied. These properties demonstrate that the ferro – antiferromagnetic magnetic two-phase state are in the oxygen deficiency samples. In samples with y  0 in lattice sites, in which the oxygen ions are absent, electrons in twos are disposed from maintenance of a crystal electroneutrality. They partially (in x = 0.4, y = 0.13) or fully (in x = 0.4, y = 0.2; x = 0.2, y = 0.13, 0.2) compensate single-charge acceptors (Sr2+ ions). In non-compensated donors two electron spins are antiparallel and do not form of the ferromagnetic nanoregions from the s-d exchange gain (ferrons). In sites of lattice with the oxygen vacancies the broken Mn-O-Mn connections present which break the ferromagnetic exchange interactions in them decreasing the middle magnetization in samples with x = 0.2, 0.4 and y = 0.13 and provoking a transition to superparamagnetic behavior in samples with x = 0.2, 0.4 and y = 0.2.

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Section: Resultsmentioning

confidence: 75%

Influence of Oxigen Deficiency on Magnetic, Magnetoresistive and Magnetoelastic Properties of La1-xSrxMnO3-y Manganites

Zashchirinskii

Koroleva

Khapaeva

et al. 2009

SSP

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“…For spinel chalcogenides, magnetic and magnetotransport properties are determined by distribution and localization of metal ions in their tetrahedral as well as octahedral cationic sites and their oxidation states [ 28–30 ]. In this family, cubic thiospinel CuTi 2 S 4 having Ti 3+ and Ti 4+ mixed valence exhibits a Pauli paramagnetic behaviour whereas a double exchange between high spin Cr 3+ and Cr 4+ is reported to be responsible for ferromagnetism observed in CuCr 2 S 4 [ 31 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

Thermoelectric materials taking advantage of spin entropy: lessons from chalcogenides and oxides

Hébert

Daou

Maignan

et al. 2021

Science and Technology of Advanced Materials

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The interplay between charges and spins may influence the dynamics of the carriers and determine their thermoelectric properties. In that respect, magneto-thermoelectric power MTEP, i.e. the measurements of the Seebeck coefficient S under the application of an external magnetic field, is a powerful technique to reveal the role of magnetic moments on S . This is illustrated by different transition metal chalcogenides: CuCrTiS 4 and CuMnTiS 4 magnetic thiospinels, which are compared with magnetic oxides, Curie-Weiss (CW) paramagnetic misfit cobaltites, ruthenates, either ferromagnetic perovskite or Pauli paramagnet quadruple perovskites, and CuGa 1- x Mn x Te 2 chalcopyrite telluride and Bi 1.99 Cr 0.01 Te 3 in which diluted magnetism is induced by 3%-Mn and 1%-Cr substitution, respectively. In the case of a ferromagnet (below T C ) and CW paramagnetic materials, the increase of magnetization at low T when a magnetic field is applied is accompanied by a decrease of the entropy of the carriers and hence decreases. This is consistent with the lack of MTEP in the Pauli paramagnetic quadruple perovskites. Also, no significant MTEP is observed in CuGa 1- x Mn x Te 2 and Bi 1.99 Cr 0.01 Te 3 , for which Kondo-type interaction between magnetic moments and carriers prevails. In contrast, spin glass CuCrTiS 4 exhibits negative MTEP like in ferromagnetic ruthenates and paramagnetic misfit cobaltites. This investigation of some chalcogenides and oxides provides key ingredients to select magnetic materials for which S benefits from spin entropy.

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“…As the cationic distribution can change when substitution occurs, the physical properties of the spinel material may strongly differ from those of the non-substituted compound. Therefore, solid solutions of thiospinels have received considerable attention for their interesting electrical and magnetic properties, which can greatly vary as a function of composition [6,7].…”

Section: Introductionmentioning

confidence: 99%

Magnetic and structural properties of the chromium-based Mn1−xCdxCr2S4 thiospinel

Barahona

Galdámez

Manrı́quez

et al. 2009

Journal of Alloys and Compounds

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New magnetic semiconductors Fe1−Cr2(1−)Sn2S4

Cited by 5 publications

References 3 publications

Influence of Oxigen Deficiency on Magnetic, Magnetoresistive and Magnetoelastic Properties of La<sub>1-x</sub>Sr<sub>x</sub>MnO<sub>3-y</sub> Manganites

Influence of Oxigen Deficiency on Magnetic, Magnetoresistive and Magnetoelastic Properties of La<sub>1-x</sub>Sr<sub>x</sub>MnO<sub>3-y</sub> Manganites

Thermoelectric materials taking advantage of spin entropy: lessons from chalcogenides and oxides

Magnetic and structural properties of the chromium-based Mn1−xCdxCr2S4 thiospinel

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