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标题：Ferromagnetic-like behavior of Bi0.9La0.1FeO3–KBr nanocomposites
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作者：Dmitry V. Karpinsky ; Olena M. Fesenko ; Maxim V. Silibin 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2019
卷号：9
期号：1
页码：1-10
DOI：10.1038/s41598-019-46834-0
出版社：Springer Nature
摘要：We studied magnetostatic response of the Bi 0.9 La 0.1 FeO 3 - KBr composites (BLFO-KBr) consisting of nanosized (≈100 nm) ferrite Bi 0.9 La 0.1 FeO 3 (BLFO) conjugated with fine grinded ionic conducting KBr. When the fraction of KBr is rather small (less than 15 wt%) the magnetic response of the composite is very weak and similar to that observed for the BLFO (pure KBr matrix without Bi 1-x La x FeO 3 has no magnetic response as anticipated). However, when the fraction of KBr increases above 15%, 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 Bi 1-z La z FeO 3 ceramics with z ≤ 0.15, 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 Bi 0.9 La 0.1 FeO 3 with ionic conductor KBr, can be relevant.