|About this Abstract
||Materials Science & Technology 2017
||Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
||Observation of Re-entrant Spin Reorientation in TbFe1-xMnxO3
||Jincang Zhang, Wenlai Lu, Fei Chen, Yifei Fang
|On-Site Speaker (Planned)
We report a spin reorientation from Γ4(Gx, Ay, Fz) to Γ1(Ax, Gy, Cz) magnetic configuration near room temperature and a re-entrant transition from Γ1(Ax, Gy, Cz) to Γ4(Gx, Ay, Fz)at low temperature in TbFe1-xMnxO3 single crystals by performing both magnetization and neutron diffraction measurements. The Γ4-Γ1 spin reorientation temperature can be enhanced to room temperature. These new transitions are distinct from the well-known Γ4-Γ2 transition observed in TbFeO3, and the sinusoidal antiferromagnetism to spiral magnetism transition observed in multiferroic TbMnO3. We further study the evolution of magnetic entropy change (-∆S) versus Mn concentration to reveal the mechanism of the re-entrant spin reorientation behavior and the complex magnetic phase at low temperature. The large magnetocaloric effect reveals that the studied material could be a potential magnetic refrigerant. These findings expand our knowledge of spin reorientation phenomena and offer the alternative realization of spin-switching devices at room temperature in the rare-earth orthoferrites.