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Electronic properties of semiconductors

Magnetic Properties of Fe$_x$Mn$_{1-x}$In$_2$S$_4$ Alloy Single Crystals

I. V. Bondar'^a, S. V. Trukhanov<sup>b

a</sup> Belarussian State University of Computer Science and Radioelectronic Engineering
^b Scientific-Practical Materials Research Centre of NAS of Belarus

Abstract: This study concerns the magnetic properties of single crystals of Fe$_x$Mn$_{1-x}$In$_2$S$_4$ alloys. The basically antiferromagnetic character of indirect exchange interactions between Fe$^{2+}$ and Mn$^{2+}$ cations is established. As the concentration of Fe$^{2+}$ cations is increased, the magnetic ordering temperature increases from $\sim$12 K ($x$ = 0) to $\sim$22 K ($x$ = 1). Short-range-order ferromagnetic correlations are observed. The basic magnetic phase state of the alloys is the spin glass state, with the freezing temperature increasing from $\sim$5 K ($x$ = 0) to $\sim$12 K ($x$ = 1). As the external magnetic field is increased, the magnetic ordering temperature slightly decreases. The most probable causes and mechanisms of formation of the magnetic state of the alloys are discussed.

Received: 11.05.2011
Accepted: 16.05.2011

 English version: Semiconductors, 2011, 45:11, 1408–1413

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