Thermal conductivity of ferrimagnet GdBaMn2O5.0 single crystals | Zendy

Jie Wu | Zendy; Jin Zhao | Zendy; HanShu Xu | Zendy; X. G. Liu | Zendy; A. A. Taskin | Zendy; Yoichi Ando | Zendy; Xinguo Zhao | Zendy; X. F. Sun | Zendy

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Thermal conductivity of ferrimagnet GdBaMn2O5.0 single crystals

Author(s) -

Jie Wu,

Jin Zhao,

HanShu Xu,

X. G. Liu,

A. A. Taskin,

Yoichi Ando,

Xinguo Zhao,

X. F. Sun

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4973294

Subject(s) - ferrimagnetism , condensed matter physics , anisotropy , magnon , scattering , thermal conductivity , spins , phonon scattering , phonon , materials science , coupling (piping) , magnetic anisotropy , spin (aerodynamics) , magnetic field , magnetization , ferromagnetism , physics , optics , quantum mechanics , metallurgy , composite material , thermodynamics

GdBaMn2O5.0 is a double-perovskite ferrimagnet consisting of pyramidal manganese layers. In this work, we study the in-plane and the c-axis thermal conductivities of GdBaMn2O5.0 single crystals at low temperatures down to 0.3 K and in high magnetic fields up to 14 T. The κc(T) curve shows a broad hump below the Néel temperature (TN = 144 K), which indicates the magnon heat transport along the c axis. Whereas, the κa(T) shows a kink at TN, caused by a magnon-phonon scattering effect. This anisotropic behavior is caused by the anisotropy of spin interactions along different directions. At very low temperatures, magnetic-field-induced changes of κa and κc, which is likely due to phonon scattering by free Gd3+ spins, is rather weak. This indicates that the spin coupling between Gd3+ and Mn2+/Mn3+ is rather strong at low temperatures

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