Abstract Magnetic structure and spin reorientation transition of 45% Mn substituted HoFeO3 have been investigated using bulk magnetization, neutron powder diffraction and specific heat capacity techniques. These studies confirm the presence of antiferromagnetic ordering of Fe/Mn sublattice below 336 K. The spin reorientation (SR) transition (TSR ~ 290 K) where the magnetic structure changes from Γ4(Ax, Fy, Gz) to Γ1(Gx, Cy, Az) is confirmed by Rietveld analysis of neutron diffraction patterns taken at various temperatures. Though the spin reorientation (SR) transition is happening at 290 K, the system is found to be in mixed Γ4(Ax, Fy, Gz) + Γ1(Gx, Cy, Az) phase from room temperature to 275 K. Below 275 K, the sample exhibits a pure Γ1(Gx, Cy, Az) structure in which the weak ferromagnetic component is absent. Bulk magnetization and specific heat capacity measurements also confirm the Neel temperature and spin reorientation transitions and support the neutron diffraction analysis.

中文翻译：

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Mn 取代的 HoFeO3 中近室温自旋重定向和磁结构的温度演化

摘要 使用体磁化、中子粉末衍射和比热容技术研究了 45% Mn 取代的 HoFeO3 的磁性结构和自旋重定向转变。这些研究证实了低于 336 K 的 Fe/Mn 亚晶格存在反铁磁有序。 自旋重定向 (SR) 转变 (TSR ~ 290 K)，其中磁性结构从 Γ4(Ax, Fy, Gz) 变为 Γ1(Gx, Cy , Az) 由在不同温度下拍摄的中子衍射图的 Rietveld 分析证实。尽管自旋重定向 (SR) 转变发生在 290 K，但发现系统从室温到 275 K 处于混合 Γ4(Ax, Fy, Gz) + Γ1(Gx, Cy, Az) 相。低于 275 K ，样品表现出纯 Γ1(Gx, Cy, Az) 结构，其中不存在弱铁磁成分。