Universität zu Köln

Zakutna, D., Alemayehu, A., Vlcek, J., Nemkovski, K., Grams, C. P., Niznansky, D., Honecker, D. and Disch, Sabrina ORCID: 0000-0002-4565-189X (2019). Critical size limits for collinear and spin-spiral magnetism in CoCr2O4. Phys. Rev. B, 100 (18). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

The multiferroic behavior of CoCr2O4 results from the appearance of conical spin-spiral magnetic ordering, which induces electric polarization. The magnetic ground state has a complex size-dependent behavior, which collapses when reaching a critical particle size. Here the magnetic phase stability of CoCr2O4 in the size range of 3.6-14.0 nm is presented in detail using the combination of neutron diffraction with XYZ polarization analysis and macroscopic magnetization measurements. We establish critical coherent domain sizes for the formation of the spin spiral and ferrimagnetic structure and reveal the evolution of the incommensurate spin spiral vector with particle size. We further confirm the presence of ferroelectric polarization in the spin spiral phase for nanocrystalline CoCr2O4.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zakutna, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Alemayehu, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vlcek, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nemkovski, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grams, C. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Niznansky, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Honecker, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Disch, Sabrina UNSPECIFIED orcid.org/0000-0002-4565-189X UNSPECIFIED
URN:	urn:nbn:de:hbz:38-127074
DOI:	10.1103/PhysRevB.100.184427
Journal or Publication Title:	Phys. Rev. B
Volume:	100
Number:	18
Date:	2019
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRANSITIONS; PHASE Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/12707