Universität zu Köln

Halder, M., Chacon, A., Bauer, A., Simeth, W., Muehlbauer, S., Berger, H., Heinen, L., Garst, M., Rosch, A. and Pfleiderer, C. (2018). Thermodynamic evidence of a second skyrmion lattice phase and tilted conical phase in Cu2OSeO3. Phys. Rev. B, 98 (14). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

Precision measurements of the magnetization and ac susceptibility of Cu2OSeO3 are reported for magnetic fields along different crystallographic directions, focusing on the border between the conical and the field-polarized state for a magnetic field along the < 100 > axis, complemented by selected specific heat data. Clear signatures of the emergence of a second skyrmion phase and a tilted conical phase are observed, as recently identified by means of small angle neutron scattering. The low-temperature skyrmion phase displays strongly hysteretic phase boundaries, but no dissipative effects. In contrast, the tilted conical phase is accompanied by strong dissipation and higher-harmonic contributions, while the transition fields are essentially nonhysteretic. The formation of the second skyrmion phase and tilted conical phase are found to be insensitive to a vanishing demagnetization factor. A quantitative estimate of the temperature dependence of the magnetocrystalline anisotropy may be consistently inferred from the magnetization and the upper critical field and agrees well with a stabilization of the low-temperature skyrmion phase and tilted conical state by conventional cubic magnetic anisotropies.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Halder, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chacon, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bauer, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Simeth, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Muehlbauer, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Berger, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Heinen, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Garst, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rosch, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pfleiderer, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-169138
DOI:	10.1103/PhysRevB.98.144429
Journal or Publication Title:	Phys. Rev. B
Volume:	98
Number:	14
Date:	2018
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 TEMPERATURE Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16913