Single crystal neutron diffraction study of the magnetic structure of TmNi2B2C

Neutron diffraction techniques have been used to study the magnetic structure of single crystals of the magnetic superconductor (Tc≅11 K) TmNi2B2C. We find that below approximately 1.5 K the magnetic moments order in an incommensurate spin wave with propagation vector qm=qm(a*+b*) [or qm=qm(a*−b*)]...

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Bibliographic Details
Published in:Journal of applied physics 1997-04, Vol.81 (8), p.4937-4939
Main Authors: Sternlieb, B., Stassis, C., Goldman, A. I., Canfield, P., Shapiro, S.
Format: Article
Language:English
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Summary:Neutron diffraction techniques have been used to study the magnetic structure of single crystals of the magnetic superconductor (Tc≅11 K) TmNi2B2C. We find that below approximately 1.5 K the magnetic moments order in an incommensurate spin wave with propagation vector qm=qm(a*+b*) [or qm=qm(a*−b*)] with qm=0.094±0.001. The spin wave is transverse with the moments aligned along the c axis, and the observation of relatively intense higher-order harmonics shows that the modulation is not purely sinusoidal but considerably squared. This incommensurate magnetic structure, which coexists with superconductivity below TN≅1.5 K, is quite different from those observed in the magnetic superconductors HoNi2B2C and ErNi2B2C. The origin of diffraction peaks observed in scans parallel to a* is briefly discussed.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.365003