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Structural transition and magnetic properties of Mn doped Bi0.88Sm0.12FeO3 ceramics

机译：Mn掺杂Bi0.88m0.12fe3陶瓷的结构过渡和磁性性能

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摘要

We investigated the effects of Mn doping on the crystal structure, phonon vibration, and magnetic properties of Bi _(0.88) Sm _(0.12) FeO _(3) ceramics. Mn doping effectively modified the rhombohedral symmetry and induced a structural transition from an R 3 c rhombohedral to Pnam orthorhombic structure. Magnetic measurements revealed a weak ferromagnetic behavior, which was related to the canted antiferromagnetic order of the Pnam structure. The cycloidal spin structure of the R 3 c phase could not be suppressed by substitution of Mn at the Fe site. Studies on the self-phase transition and electric field-induced structural transition revealed many changes in coercivity and remanent magnetization, which are believed to originate from the R 3 c / Pnam phase switching along with spin frustration. Observations of the field step-dependent hysteresis loop and the ferromagnetic-like hysteresis loop after poling in an electric field provided direct evidence of phase boundary (PB) ferromagnetism and magnetic coupling at the PB.
机译：我们调查了Mn掺杂对晶体结构，声子振动和Bi _（0.88）SM _（0.12）Feo _（3）陶瓷的磁性结构的影响。 Mn掺杂有效修饰了菱形对称性，并诱导了从R 3 C菱形对Pnam矫正结构的结构转变。磁测量揭示了弱铁磁性行为，其与Pnam结构的倾斜反铁磁阶有关。通过在Fe位点取代Mn，不能抑制R 3 C相的环状旋转结构。对自相过渡和电场诱导的结构转变的研究揭示了矫顽力和再现磁化的许多变化，据信源自R 3 C / Pnam阶段切换以及旋转挫折。在电场中抛光之后的场依赖性滞后回路和铁磁样滞回的观察提供了在PB处的相边界（Pb）铁磁和磁耦合的直接证据。

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