Quasi-Two-Dimensional Ferromagnetism in Cr₂Te₃ and Cr₅Te₈ Crystals

• Authors: M. Bester , I. Stefaniuk , M. Kuzma
• Languages of publication: EN

Abstracts

EN

The crystal structure of CrTe suggests two-dimensional magnetism in the plane perpendicular to the c axis. It is consistent with the temperature dependence of the g factor and EPR lines width observed. In the present paper we investigate the CrTe alloy which has been prepared by melting of the powdered Cr₂Te₃ in evacuated quartz ampoule at the temperature 1600 K. ESR spectra were recorded using X-band (9.4 GHz) spectrometer provided with gas nitrogen cryostat. The shape of the EPR line depends strongly on the temperature. In the vicinity of the room temperature the lines become very wide and weak or disappear completely. At lower temperatures the shape of the lines approaches the Dyson function. The asymmetry of lines is attributed to the strong exchange interactions as well as to the semimetal electrical conductivity. Above the room temperature the shape of spectra is characteristic for the paramagnetic phase. Results were addressed based on the model of critical spin fluctuations in two-dimensional Heisenberg magnet proposed by Eremin et al.

Keywords

EN

76.50.+g; 75.50.Cc

Discipline

• 75.50.Cc: Other ferromagnetic metals and alloys
• 76.50.+g: Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance(see also 75.30.Ds Spin waves)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 433-435

Dates

published

2015-02

Contributors

author

M. Bester

• University of Rzeszów, Faculty of Mathematics and Natural Sciences, S. Pigonia 1, 35-959 Rzeszów, Poland

author

I. Stefaniuk

• University of Rzeszów, Faculty of Mathematics and Natural Sciences, S. Pigonia 1, 35-959 Rzeszów, Poland

author

M. Kuzma

• University of Rzeszów, Faculty of Mathematics and Natural Sciences, S. Pigonia 1, 35-959 Rzeszów, Poland

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Identifiers

DOI

10.12693/APhysPolA.127.433