New antiferromagnetic semiconductor CuCr1.5Sb0.5S4

Warczewski, J.; Kusz, Joachim; Kessler, Ya.A.; Koroleva, L. I.; Mikheev, M. G.; Odintsov, A. A.; Аминов, Т. Г.; Busheva, E. V.; Шабунина, Г. Г.

doi:10.1016/s0304-8853(97)00161-3

Cited by 18 publications

(26 citation statements)

References 2 publications

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“…The evolution of the above described magnetization with the increase of x is in good agreement with the appearance of both a spin-glass state for x = 0.3 and 0.4 [3,4,6,7] and collinear antiferromagnetism for x = 0.5 [5].…”

Section: Experimental and Resultssupporting

confidence: 78%

“…The dilution of the magnetic subarray of chromium ions by introducing nonmagnetic ions in these compounds can influence their magnetic and electrical properties. An example of such effects present the compounds of the spinel family CuCr 2−x Sb x S 4 [3][4][5]. In the latter compounds a spin glass state was observed for x = 0.3 and 0.4 at low temperatures (below 150 K) [3,4,6,7].…”

Section: Introductionmentioning

confidence: 99%

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On the influence of Sb concentration on the magnetization and magnetoresistivity in the spinel compounds CuCr2−xSbxS4 (where x = 0.3, 0.4, 0.5)

Krok‐Kowalski

Warczewski

Koroleva

et al. 2004

Journal of Alloys and Compounds

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Section: Experimental and Resultssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

On the influence of Sb concentration on the magnetization and magnetoresistivity in the spinel compounds CuCr2−xSbxS4 (where x = 0.3, 0.4, 0.5)

Krok‐Kowalski

Warczewski

Koroleva

et al. 2004

Journal of Alloys and Compounds

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“…However, we have performed the analysis using the scattering paths prepared with FEFF6.02L code [18]. The starting model was based on the structure obtained from the single-crystal X-ray diffraction measurements and the thermal coefficients were constrained to singlecrystal data for CuCr 1.5 Sb 0.5 S 4 [10]. For the first shell, we have used three single scattering paths:…”

Section: Exafsmentioning

confidence: 99%

The influence of the concentration of Sb ions onto the local crystal and electronic structures of CuCr2−xSbxS4 (x=0.3, 0.4, 0.5) studied by XANES and EXAFS measurements and LAPW numerical calculations

Zajdel¹,

Kisiel²,

Warczewski³

et al. 2005

Journal of Alloys and Compounds

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“…Its paramagnetic susceptibility obeys the Curie-Weiss law with the paramagnetic Curie temperature q ¼ 130 K, which is much higher than the value q ¼ --156 K for CuCr 1.5 Sb 0.5 S 4 [1,3]. It is known that the value of q is determined by the sum of exchange interaction in the crystal.…”

mentioning

confidence: 88%

“…In this work, a giant magnetoresistance (MR) was found in the CuCr 1.6 Sb 0.4 S 4 compound semiconductor consisting of a solid solution of two compounds with the normal spinel structure: Cu 1þ Cr 1.5 3þ Sb 0.5 S 4 antiferromagnet (AF) with conduction of the semiconductor type [1] and CuCr 2 3þ S 4 2--ferromagnet (F) with conduction of the metallic type [2]. This is surprising because no MR was observed within the experimental error (0.01%) in either CuCr 1.5 Sb 0.5 S 4 or CuCr 2 S 4 .…”

mentioning

confidence: 99%

Giant Magnetoresistance in Spinel CuCr1.6Sb0.4S4

Koroleva¹,

Demin²,

Warczewski³

et al. 2002

phys. stat. sol. (a)

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A giant magnetoresistance (MR) is found in the CuCr 1.6 Sb 0.4 S 4 semiconductor spinel, consisting of a solid solution of the CuCr 1.5 Sb 0.5 S 4 antiferromagnet (AF) and the CuCr 2 S 4 ferromagnet. This MR is negative and isotropic. Its value is equal to 74% at temperature T ¼ 3 K (magnetic field H ¼ 38 T) and decreases with decreasing T. Magnetization isotherms are the superposition of a linear part, as for AF, and a small spontaneous magnetization. Therefore we assume that the sample is an AF in which droplets with spontaneous magnetization are disposed. Nagaev showed that giant MR in doped AF semiconductors is explained by similar magnetic two-phase state, in which all the electrons are concentrated in droplets because of the energy gain in s-d exchange.In this work, a giant magnetoresistance (MR) was found in the CuCr 1.6 Sb 0.4 S 4 compound semiconductor consisting of a solid solution of two compounds with the normal spinel structure: Cu 1þ Cr 1.5 3þ Sb 0.5 S 4 antiferromagnet (AF) with conduction of the semiconductor type [1] and CuCr 2 3þ S 4 2--ferromagnet (F) with conduction of the metallic type [2]. This is surprising because no MR was observed within the experimental error (0.01%) in either CuCr 1.5 Sb 0.5 S 4 or CuCr 2 S 4 . The magnetoresistance Dr/r ¼ (r H --r H¼ 0 )/r H¼ 0 , the resistivity r, and the magnetization M of the polycrystalline CuCr 1.6 Sb 0.4 S 4 sample were investigated. The magnetization in a constant magnetic field H 14 T was measured by the induction method, and the resistivity was measured by the four probe method. Both a stationary magnetic field H 10 T and a pulsed magnetic field H 38 T were used for measuring MR.The dependence of r on the temperature T is of the semiconductor type. The dependence of (Dr/r) on T at H ¼ 10 and 38 T is shown in Fig. 1. This MR is negative and isotropic. It is apparent in Fig. 1 that the MR value at low temperature is very large (Dr/r ¼ 74% at T ¼ 3 K and H ¼ 38 T) and decreases with decreasing temperature, becoming close to zero at 35 K T 39 K. (The Neel temperature of this compound is T N ¼ 42.8 K [3]).

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New antiferromagnetic semiconductor CuCr1.5Sb0.5S4

Cited by 18 publications

References 2 publications

On the influence of Sb concentration on the magnetization and magnetoresistivity in the spinel compounds CuCr2−xSbxS4 (where x = 0.3, 0.4, 0.5)

On the influence of Sb concentration on the magnetization and magnetoresistivity in the spinel compounds CuCr2−xSbxS4 (where x = 0.3, 0.4, 0.5)

The influence of the concentration of Sb ions onto the local crystal and electronic structures of CuCr2−xSbxS4 (x=0.3, 0.4, 0.5) studied by XANES and EXAFS measurements and LAPW numerical calculations

Giant Magnetoresistance in Spinel CuCr1.6Sb0.4S4

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