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검색결과 41건 처리시간 0.013초

반대칭 교환 상호작용을 갖도록 Fe-Site가 제어된 PbFe1/2Nb1/2O3의 강유전/자기적 특성 연구 (Investigation on Ferroelectric and Magnetic Properties of Pb(Fe1/2Nb1/2)O3 Fe-Site Engineered with Antisymmetric Exchange Interaction)

  • 박지훈;이주현;조재현;장종문;조욱
    • 한국전기전자재료학회논문지
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    • 제35권3호
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    • pp.297-302
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    • 2022
  • We investigated the origin of magnetic behaviors induced by an asymmetric spin exchange interaction in Fe-site engineered lead iron niobate [Pb(Fe1/2Nb1/2)O3, PFN], which exhibits a room-temperature multiferroicity. The magnitude of spin exchange interaction was regulated by the introduced transition metals with a distinct Bohr magneton, i.e., Cr, Co, and Ni. All compositions were found to have a single-phase perovskite structure keeping their ferroelectric order except for Cr introduction. We discovered that the incorporation of each transition metal imposes a distinct magnetic behavior on the lead iron niobate system; antiferro-, hard ferro-, and soft ferromagnetism for Cr, Co, and Ni, respectively. This indicates that orbital occupancy and interatomic distance play key roles in the determination of magnetic behavior rather than the magnitude of the individual Bohr magneton. Further investigations are planned, such as X-ray absorption spectroscopy, to clarify the origin of magnetic properties in this system.