Low Temperature Physics: 31, 277 (2005); https://doi.org/10.1063/1.1884430 (6 pages)
Fizika Nizkikh Temperatur: Volume 31, Number 3-4 (March 2005), p. 367-373    ( to contents , go back )

The magnetization behaviour at orientation transitions: TmFeO3, ErFeO3

L.T. Tsymbal1,3, Ya.B. Bazaliy1,2, G.N. Kakazei3,4, Yu.I. Nepochatykh1, and P.E. Wigen3

1A. Galkin Donetsk Physico-Technical Institute of the National Academy of Sciences of Ukraine 72 R. Luxemburg Str., Donetsk 83114 , Ukraine
E-mail: tsymbal@sova.fti.ac.donetsk.ua

2IBM Almaden Research Center, San Jose, CA, USA

3Department of Physics, Ohio State University, Columbus, OH, USA

4Institute of Magnetism of the National Academy of Sciences of Ukraine 36-b Vernadsky Ave. Kiev 03142, Ukraine
pos Анотація:

Received September 20, 2004

Abstract

The magnetization of the TmFeO3 single- crystal is studied in a Г4–Г24–Г2 spin-rotation temperature interval. The magnetic moment projections on the a and c crystallographic axes are measured by a SQUID magnetometer and used to calculate the absolute value of magnetization |M|(T) and its rotation angle q(T). The results are compared with the data obtained on ErFeO3 samples. While the |M|(T) и q(T) curves for the two orthoferrites are quite different, both are well described by the modified mean field theory, suggested earlier by the authors. The theory does not involve the fitting parameters and its experimental verification in the other material demonstrates the generality of the proposed description of Г4–Г24–Г2 orientation phase transitions in orthoferrites.

PACS:
75.30.Kz - Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
75.50.Dd - Nonmetallic ferromagnetic materials
75.60.-d - Domain effects, magnetization curves, and hysteresis

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