Magnetic susceptibility of multiferroics and chemical ordering

0473843 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Maryško, Miroslav - Laguta, Valentyn - Raevski, I. P. - Kuzian, R. O. - Olekhnovich, N.M. - Pushkarev, A.V. - Radyush, Yu.V. - Raevskaya, S. I. - Titov, V.V. - Kubrin, S.P.
Magnetic susceptibility of multiferroics and chemical ordering.
AIP Advances. Roč. 7, č. 5 (2017), s. 1-6, č. článku 056409. E-ISSN 2158-3226
Grant CEP: GA ČR GA13-11473S
Institucionální podpora: RVO:68378271
Klíčová slova: multiferroic * spin glass * antiferromagnetic * ferroelectrics
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.653, rok: 2017

Magnetic susceptibility of two types of perovskite compounds A(Fe0.5M0.5)O3 A = Ba,Sr with M = Nb and Sb differing in the degree of chemical ordering was studied between 2 and 380 K. In the low temperature region, these compounds exhibit antiferromagnetic and spin-glass transition at T = 16-30 K. For the ordered compounds (M = Sb) the inverse susceptibility depends on T linearly up to the highest temperatures used. This enables the determination of the Weiss temperature θ and effective moment of the Fe3+ ion. In contrast to it, the compounds with M = Nb are characterized by a higher degree of the glassines and by a concave character of the inverse susceptibility vs T dependence in the high temperature region. The observed behavior was qualitatively explained from the Curie-Weiss law taking into account a distribution of the values θ corresponding to a distribution of the superexchange interactions between the Fe3+ ions.

Trvalý link: http://hdl.handle.net/11104/0270970