Universität zu Köln

Kindervater, J., Haeussler, W., Janoschek, M., Pfleiderer, C., Boeni, P. and Garst, M. (2014). Critical spin-flip scattering at the helimagnetic transition of MnSi. Phys. Rev. B, 89 (18). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We report spherical neutron polarimetry (SNP) and discuss the spin-flip scattering cross sections as well as the chiral fraction. close to the helimagnetic transition in MnSi. For our study we have developed a miniaturized SNP device that allows fast data collection when used in small angle scattering geometry with an area detector. Critical spin-flip scattering is found to be governed by chiral paramagnons that soften on a sphere in momentum space. Carefully accounting for the incoherent spin-flip background, we find that the resulting chiral fraction. decreases gradually above the helimagnetic transition reflecting a strongly renormalized chiral correlation length with a temperature dependence in excellent quantitative agreement with the Brazovskii theory for a fluctuation-induced first order transition.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kindervater, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haeussler, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Janoschek, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pfleiderer, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Boeni, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Garst, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-438216
DOI:	10.1103/PhysRevB.89.180408
Journal or Publication Title:	Phys. Rev. B
Volume:	89
Number:	18
Date:	2014
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 NEUTRON POLARIMETRY; FEGE Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43821