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No.3(pp.93-132)

Home > Issues > Volume 12 (2007) > No.3(pp.93-132)

Crystallographic, Magnetic and MËossbauer Study of Phase Transition in LaVO₃

Journal of Magnetics, Volume 12, Number 3, 30 Sep 2007, Pages 108-112

Sung-Hyun Yoon*

(Department of Physics, Gunsan National University)

Abstract

Nature of phase transition in LaVO₃has been studied using X-ray diffraction, SQUID magnetometer, and MËossbauer spectroscopy with 1% of ⁵⁷Fe doped sample. The crystal structure was orthorhombic with space group Pnma. Antiferromagnetic phase transition temperature T_Nwas 140K, below which a weak ferromagnetic trace has been found. MËossbauer spectra below T_Nwere single set of hyperfine sextet, which enabled us to discard the possibility of two inequivalent magnetic sites or uncompensated antiferromagnetism. Hyperfine magnetic field abruptly disappeared as low as about 90K, much below T_N.

Keywords: LaVO_3; 1%^57 Fe doping; MËossbauer spectroscopy; weak ferromagnetism

DOI: 10.4283/JMAG.2007.12.3.108

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