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journal article·2017-05-01Open access

Thermal conductivity of ferrimagnet GdBaMn2O5.0 single crystals

J. C. Wu, J. Y. Zhao, H. S. Xu, X. G. Liu, A. A. Taskin, Yoichi Ando, X. Zhao, X. F. Sun

AIP Advances· Volume 7· Issue 5
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Source abstract

Abstract

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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Research context

Electronic materials

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Multiferroics and related materials · Advanced Condensed Matter Physics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

University of Science and Technology of China 1 Hefei National Laboratory for Physical Sciences at Microscale, , Hefei, Anhui 230026, People’s Republic of China

Universität zu Köln 2 II. Physikalisches Institut, , Zülpicher Strasse 77, D-50937 Köln, Germany

University of Science and Technology of China 3 School of Physical Sciences, , Hefei, Anhui 230026, People’s Republic of China

Chinese Academy of Sciences 4 Key Laboratory of Strongly-Coupled Quantum Matter Physics, , Hefei, Anhui 230026, People’s Republic of China

Collaborative Innovation Center of Advanced Microstructures 5 , Nanjing, Jiangsu 210093, People’s Republic of China

Funding

National Basic Research Program of China · Opening Project of Wuhan National High Magnetic Field Center · National Natural Science Foundation of China

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