Universität zu Köln

Ackermann, M., Andersen, L., Lorenz, T., Bohaty, L. and Becker, P. (2015). Anisotropy study of multiferroicity in the pyroxene NaFeGe2O6. New J. Phys., 17. BRISTOL: IOP PUBLISHING LTD. ISSN 1367-2630

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Abstract

We present a study of the anisotropy of the dielectric, magnetic and magnetoelastic properties of the multiferroic clinopyroxene NaFeGe2O6. Pyroelectric currents, dielectric constants and magnetic susceptibilities as well as the thermal expansion and the magnetostriction were examined on large synthetic single crystals of NaFeGe2O6. The spontaneous electric polarization detected below T-C similar or equal to 11.6 K in an antiferromagnetically ordered state (T-N similar or equal to 13 K) is mainly lying within the ac plane with a small component along b, indicating a triclinic symmetry of the multiferroic phase of NaFeGe2O6. The electric polarization can be strongly modified by applying magnetic fields along different directions. We derive detailed magnetic field versus temperature phase diagrams and identify three multiferroic low-temperature phases, which are separated by a non-ferroelectric, antiferromagnetically ordered state from the paramagnetic high-temperature phase.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ackermann, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Andersen, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lorenz, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bohaty, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Becker, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-414522
DOI:	10.1088/1367-2630/17/1/013045
Journal or Publication Title:	New J. Phys.
Volume:	17
Date:	2015
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1367-2630
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MAGNETIC-STRUCTURE Multiple languages Physics, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41452