The magnetic susceptibility of single-crystal antiferromagnet ( = 289 K) was measured in the temperature range from 4.2 to 300 K in a magnetic field H up to 40 kOe applied along the main crystallographic axes. For the antiferromagnetic (AFM) state at low temperatures, a strong increase in is observed with increasing H applied along the  axis, which reaches saturation at 11 kOe. It is assumed that this behavior is associated with a field-induced change in the AFM domain structure, and the single-domain state is realized in a field above with the AFM axis perpendicular to the field direction. The study of under the uniaxial and uniform P pressures in a wide temperature range has revealed an anomalously large increase in in AFM state with increasing uniaxial pressure for at . The observed growth of saturates at pressure kbar and suggests the formation of the single-domain state for the above conditions. The values of uniform pressure effect on was found to lie in the range = − (2–3) Mbar–1, being weakly dependent on the magnetic state and field direction. In addition, the uniform pressure effect on the transition temperature between two AFM structures in , K, was found to be weak.
Magnetic and magnetoelastic properties of antiferromagnet FeGe2
Fiz. Nizk. Temp. 49, 1129–1134 (September 2023)
G. E. Grechnev, A. A. Lyogenkaya, V. A. Desnenko, A. V. Fedorchenko, A. S. Panfilov; Magnetic and magnetoelastic properties of antiferromagnet FeGe2. Low Temp. Phys. 1 September 2023; 49 (9): 1025–1030. https://doi.org/10.1063/10.0020594
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