Ferromagnetic-like behavior of Bi0.9La0.1FeO3-KBr nanocomposites
Abstract
We studied magnetostatic response of the Bi0.9La0.1FeO3-KBr composites (BLFO-KBr) consisting of nanosized (about 100 nm) ferrite Bi0.9La0.1FeO3 (BLFO) conjugated with fine grinded ionic conducting KBr. When the fraction of KBr is rather small (less than 15 wt percent) the magnetic response of the composite is very weak and similar to that observed for the BLFO (pure KBr matrix without Bi1-xLaxFeO3 has no magnetic response as anticipated). However, when the fraction of KBr increases above 15percent, the magnetic response of the composite changes substantially and the field dependence of magnetization reveals ferromagnetic-like hysteresis loop with a remanent magnetization about 0.14 emu/g and coercive field about 1.8 Tesla (at room temperature). Nothing similar to the ferromagnetic-like hysteresis loop can be observed in BLFO ceramics, which magnetization quasi linearly increases with magnetic field. Different physical mechanisms were considered to explain the unusual experimental results for BLFO-KBr nanocomposites, but only those among them, which are highly sensitive to the interaction of antiferromagnetic Bi0.9La0.1FeO3 with ionic conductor KBr, can be relevant. An appropriate mechanism turned out to be ferro-magneto-ionic coupling.
Keywords
Cite
@article{arxiv.1901.08913,
title = {Ferromagnetic-like behavior of Bi0.9La0.1FeO3-KBr nanocomposites},
author = {Dmitry V. Karpinsky and Olena M. Fesenko and Maxim V. Silibin and Sergei V. Dubkov and Mykola Chaika and Andriy Yaremkevich and Anna Lukowiak and Yuriy Gerasymchuk and Wieslaw Strek and Andrius Pakalniskis and Ramunas Skaudzius and Aivaras Kareiva and Yevhen M. Fomichov and Vladimir V. Shvartsman and Sergei V. Kalinin and Nicholas V. Morozovsky and Anna N. Morozovska},
journal= {arXiv preprint arXiv:1901.08913},
year = {2019}
}
Comments
24 pages, 4 figures in the main text, and supplement with 4 figures