The Physics of Metals and Metallography. Vol. 124, No. 2, Pages 133-137, 2023

N. I. Snegirev^a^,*, A. V. Bogach^b, I. S. Lyubutin^a, M. A. Chuev^c, S. V. Yagupov^d, Yu. A. Mogilenec^d, K. A. Selezneva^d, and M. B. Strugatsky^d

^aShubnikov Institute of Crystallography, Federal Scientific Research Center Crystallography and Photonics, Russian Academy of Sciences, Moscow, 119333 Russia

^bProkhorov Institute of General Physics, Russian Academy of Sciences, Moscow, 119991 Russia

^cValiev Institute of Physics and Technology, Russian Academy of Sciences, Moscow, 117218 Russia

^dInstitute of Physics and Technology, V.I. Vernadsky Crimean Federal University, Simferopol, 295007 Russia

Abstract—Highly perfect FeBO₃ and Fe_0.91Ga_0.09BO₃ single crystals were studied in a wide temperature range using SQUID magnetometry. A theoretical model describing the temperature and field dependences of the magnetization of single crystals has been developed. It is found that even a small concentration of gallium, which is a diamagnetic impurity, substantially affects the magnetic properties of single FeBO₃ crystals. In particular, the Fe_0.91Ga_0.09BO₃ crystal differs from the pure FeBO₃ phase in by a lower magnetic phase transition temperature and a higher antiferromagnetic susceptibility at low temperatures.

Keywords: iron borate, single crystals, magnetic properties, theoretical analysis

The Evolution of the Magnetic Properties of Iron Borate Single Crystals Doped with Gallium