Universität zu Köln

Wu, J. C., Zhao, J. Y., Xu, H. S., Liu, X. G., Taskin, A. A., Ando, Yoichi ORCID: 0000-0002-3553-3355, Zhao, X. and Sun, X. F. (2017). Thermal conductivity of ferrimagnet GdBaMn2O5.0 single crystals. AIP Adv., 7 (5). MELVILLE: AMER INST PHYSICS. ISSN 2158-3226

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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 kappa(c)(T) curve shows a broad hump below the Neel temperature (T-N = 144 K), which indicates the magnon heat transport along the c axis. Whereas, the kappa(a)(T) shows a kink at T-N, 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 kappa(a) and kappa(c), 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. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wu, J. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhao, J. Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Xu, H. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Liu, X. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Taskin, A. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED Zhao, X. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sun, X. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-231762
DOI:	10.1063/1.4973294
Journal or Publication Title:	AIP Adv.
Volume:	7
Number:	5
Date:	2017
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	2158-3226
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DOUBLE-PEROVSKITE; ROOM-TEMPERATURE; MAGNETORESISTANCE; SPIN Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23176