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Title: Ferromagnetic-like behavior of Bi0.9La0.1FeO3–KBr nanocomposites

Journal Article · · Scientific Reports
ORCiD logo [1];  [2];  [3];  [4];  [2];  [2];  [5];  [5];  [5];  [6];  [6];  [6];  [7]; ORCiD logo [8];  [9];  [2];  [2]
  1. Scientific-Practical Materials Research Centre of NAS of Belarus, Minsk (Belarus); DOE/OSTI
  2. NAS of Ukraine, Kyiv (Ukraine). Inst. of Physics
  3. National Research Univ. of Electronic Technology "MIET", Moscow (Russian Federation); I.M. Sechenov First Moscow State Medical Univ., Moscow (Russian Federation)
  4. National Research Univ. of Electronic Technology "MIET", Moscow (Russian Federation)
  5. Inst. of Low Temperature and Structure Research, PAS, Wroclaw, (Poland)
  6. Vilnius Univ. (Lithuania). Inst. of Chemistry
  7. Charles Univ., Prague (Czech Republic). Faculty of Mathematics and Physics
  8. Univ. of Duisburg-Essen, Essen (Germany). Inst. for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE)
  9. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

We studied magnetostatic response of the Bi0.9La0.1FeO3– KBr composites (BLFO-KBr) consisting of nanosized (≈100nm) ferrite Bi0.9La0.1FeO3 (BLFO) conjugated with fine grinded ionic conducting KBr. When the fraction of KBr is rather small (less than 15wt%)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 15%,the magnetic response of the composite changes substantially and the field dependence of magnetization reveals ferromagnetic-like hysteresis loop with a remnant magnetization about 0.14emu/g and coercive field about 1.8Tesla (at room temperature). Nothing similar to the ferromagnetic-like hysteresis loop can be observed in Bi1-zLazFeO3 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 Bi0.9La0.1FeO3 with ionic conductor KBr, can be relevant.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1624480
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 9; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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