Spin-glass transition in porous spheres BiFeO3
https://doi.org/10.17586/2220-8054-2020-11-5-565-571
Abstract
Magnetic properties of porous spheres BiFeO3 have been studied at temperatures ranging from 2 to 300 K. A transition to cluster spin glass state has been detected in the region of about 100 K. The presence of the transition is confirmed by nonlinear variation of coercive force and the appearance of exchange displacement of magnetic hysteresis loops at temperature below 100 K. Temperature dependence of magnetization for zero-field cooled regime exhibit a maximum at some temperature Tm. The function Tm(H) (H is magneic field) changes in accordance with Almeida–Thouless line. The performed measurements of the frequency dependence of AC susceptibility confirm the behavior of spin glass with spin freezing temperature Tf = 116 K. The critical index zν = 2.5 agrees well with the mean-field theory zν = 2.0.
Keywords
Supporting agencies: This work was supported by a research program at the Institute of Solid State Chemistry. The authors are grateful to Dr. Maria V. Lukashova (OOO “Tescan”, Saint Petersburg, Russia) for scanning microscopy and 3D FIB-SEM tomography.
About the Authors
A. V. Dmitriev
Institute of Solid State Chemistry, UB RAS
Russian Federation
Russian Federation
91, Pervomaiskaya Str., Ekaterinburg, 620990
E. V. Vladimirova
Institute of Solid State Chemistry, UB RAS
Russian Federation
Russian Federation
91, Pervomaiskaya Str., Ekaterinburg, 620990
M. A. Semkin
Ural Federal University, Department of Magnetism
Russian Federation
Russian Federation
48, Kuibyshev Str., Ekaterinburg
A. V. Korolev
M.N. Mikheev Institute of Metal Physics UB RAS
Russian Federation
Russian Federation
18, S. Kovalevskaya Str., Ekaterinburg, 620108
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Review
For citations:
Dmitriev A.V., Vladimirova E.V., Semkin M.A., Korolev A.V. Spin-glass transition in porous spheres BiFeO3. Nanosystems: Physics, Chemistry, Mathematics. 2020;11(5):565–571. https://doi.org/10.17586/2220-8054-2020-11-5-565-571
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