Universität zu Köln

Niermann, D., Grams, C. P., Schalenbach, M., Becker, P., Bohaty, L., Stein, J., Braden, M. and Hemberger, J. (2014). Domain dynamics in the multiferroic phase of MnWO4. Phys. Rev. B, 89 (13). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1550-235X

Full text not available from this repository.

Abstract

By using broadband linear and nonlinear dielectric spectroscopy we studied the magnetoelectric dynamics in the chiral antiferromagnet MnWO4. In the multiferroic phase the dielectric response is dominated by the dynamics of domains and domain walls which is strongly dependent on the stimulating electric field. The mean switching time reaches values in the minute range in the middle of the multiferroic temperature regime at T approximate to 10 K but unexpectedly decays again on approaching the lower, first-order phase boundary at T-N1 approximate to 7.6 K. The switchability of the ferroelectric domains denotes a pinning-induced threshold and can be described considering a growth-limited scenario with an effective growth dimension of d approximate to 1.8. The rise of the effective dynamical coercive field on cooling below the T-N2 is much stronger compared to the usual ferroelectrics and can be described by a power law E-c proportional to nu(1/2). The latter questions the feasibility of fast-switching devices based on this type of material.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Niermann, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grams, C. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schalenbach, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Becker, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bohaty, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stein, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Braden, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hemberger, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-440689
DOI:	10.1103/PhysRevB.89.134412
Journal or Publication Title:	Phys. Rev. B
Volume:	89
Number:	13
Date:	2014
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1550-235X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language E HYSTERESIS LOOP; AVRAMI MODEL; POLARIZATION Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/44068