title: Observation of re-entrant spin reorientation in TbFe1-xMnxO3.
abstract: 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 when x is around 0.5 ~ 0.6. These new transitions are distinct from the well-known Γ4 - Γ2 transition observed in TbFeO3, and the sinusoidal antiferromagnetism to complex spiral magnetism transition observed in multiferroic TbMnO3. We further study the evolution of magnetic entropy change (-ΔSM) versus Mn concentration to reveal the mechanism of the re-entrant spin reorientation behavior and the complex magnetic phase at low temperature. The variation of -ΔSM between a and c axes indicates the significant change of magnetocrystalline anisotropy energy in the TbFe1-xMnxO3 system. Furthermore, as Jahn-Teller inactive Fe(3+) ions coexist with Jahn-Teller active Mn(3+) ions, various anisotropy interactions, compete with each other, giving rise to a rich magnetic phase diagram. 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.
authors.affiliation: Materials Genome Institute, Shanghai University, Shanghai 200444, China.|Department of Physic, Shanghai University, Shanghai 200444, China.
authors.forename: Yifei
authors.initials: Y
authors.lastname: Fang
authors.affiliation: Department of Physic, Shanghai University, Shanghai 200444, China.
authors.forename: Ya
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Neutron Scattering Laboratory, China Institute of Atomic Energy, Beijing 102413, China.
authors.forename: Xinzhi
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Physic, Shanghai University, Shanghai 200444, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Kang
authors.affiliation: Neutron Scattering Laboratory, China Institute of Atomic Energy, Beijing 102413, China.
authors.forename: Lijie
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authors.lastname: Hao
authors.affiliation: Insititute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China.
authors.forename: Xiping
authors.initials: X
authors.lastname: Chen
authors.affiliation: Insititute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Xie
authors.affiliation: Insititute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China.
authors.forename: Guangai
authors.initials: G
authors.lastname: Sun
authors.affiliation: Department of Physic, Shanghai University, Shanghai 200444, China.
authors.forename: Venkatesh
authors.initials: V
authors.lastname: Chandragiri
authors.affiliation: ANSTO, Kirrawee Dc, NSW 2232, Australia.
authors.forename: Chin-Wei
authors.initials: CW
authors.lastname: Wang
authors.affiliation: Department of Physic, Shanghai University, Shanghai 200444, China.
authors.forename: Yiming
authors.initials: Y
authors.lastname: Cao
authors.affiliation: Materials Genome Institute, Shanghai University, Shanghai 200444, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Chen
authors.affiliation: Neutron Scattering Laboratory, China Institute of Atomic Energy, Beijing 102413, China.
authors.forename: Yuntao
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Neutron Scattering Laboratory, China Institute of Atomic Energy, Beijing 102413, China.
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Chen
authors.affiliation: Materials Genome Institute, Shanghai University, Shanghai 200444, China.|Department of Physic, Shanghai University, Shanghai 200444, China.
authors.forename: Shixun
authors.initials: S
authors.lastname: Cao
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstraße 1, D-70569 Stuttgart, Germany.
authors.forename: Chengtian
authors.initials: C
authors.lastname: Lin
authors.affiliation: Department of Physic, Shanghai University, Shanghai 200444, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Ren
authors.affiliation: Materials Genome Institute, Shanghai University, Shanghai 200444, China.|Department of Physic, Shanghai University, Shanghai 200444, China.
authors.forename: Jincang
authors.initials: J
authors.lastname: Zhang