Low Temperature Physics: 41, 20 (2015); https://doi.org/10.1063/1.4906312
Fizika Nizkikh Temperatur: Volume 41, Number 1 (January 2015), p. 28-33    ( to contents , go back )

Anomalous magnetization dynamics close to the temperature of spin-reorientation transition in ε-In0.24Fe1.76O3 nanowire arrays

A.I. Dmitriev1,2, H. Tokoro3, S. Ohkoshi3, and R.B. Morgunov1,2

1Институт проблем химической физики РАН, Черноголовка, Россия

2Московский государственный гуманитарный университет им. М.А. Шолохова ул. Верхняя Радищевская, 16-18, г. Москва, 109240, Россия
E-mail: aid@icp.ac.ru

3Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
pos Анотація:

Received August 18, 2014

Abstract

An anomalous direction of the shift of the temperature maximum of magnetic susceptibility with increasing magnetic field frequency was observed in ε-In0.24Fe1.76O3 nanowires arrays in spite of the prediction of the theory of thermoactivated processes. The unusual effect can be explained by the redistribution of the contributions from low- and high-temperature phases to the temperature dependence of magnetic susceptibility. The magnetic state of each of the phases is described by the model of cluster magnetic glass. Separated electron spin resonance responses of these phases were distinguished.

PACS: 75.75.–c Magnetic properties of nanostructures;
PACS: 75.50.Tt Fine-particle systems; nanocrystalline materials;
PACS: 75.50.Vv High coercivity materials.

Key words: nanowires, magnetic anisotropy, spin resonance, spin glass.

Published online: November 24, 2014

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