Appearance of Successive Phase Transition in SmRu4P12 under High Magnetic Fields Probed by 31P Nuclear Magnetic Resonance

The 31P-NMR (nuclear magnetic resonance) measurements of the filled skutterudite SmRu4P12 have been carried out in several applied magnetic fields. The line width of the 31P-NMR spectrum rapidly increases below the metal-insulator transition temperature TMI, which indicates the appearance of an inte...

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Bibliographic Details
Published in:arXiv.org 2006-10
Main Authors: Hachitani, Kenichi, Amanuma, Hideaki, Fukazawa, Hideto, Kohori, Yoh, Koyama, Keiichi, Kumagai, Ken-ichi, Sekine, Chihiro, Shirotani, Ichimin
Format: Article
Language:English
Subjects:
Insulators
Magnetic fields
Metal-insulator transition
Neel temperature
NMR
Nuclear magnetic resonance
Phase transitions
Spin-lattice relaxation
Transition temperature
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Summary:The 31P-NMR (nuclear magnetic resonance) measurements of the filled skutterudite SmRu4P12 have been carried out in several applied magnetic fields. The line width of the 31P-NMR spectrum rapidly increases below the metal-insulator transition temperature TMI, which indicates the appearance of an internal field below the temperature. Though no distinct anomaly was observed below TMI in low fields, a complicated structure was observed between the Neel temperature TN and TMI (TN < TMI) above 70 kOe. The spin-lattice relaxation rate 1/T1 is almost independent of temperature above TMI, and rapidly decreases below TMI. The 1/T1 in low fields decreases monotonously, whereas the strong suppression of 1/T1 occurs between TN and TMI above 70 kOe. The structure of the spectra and the suppression of 1/T1 become apparent with increasing field.
ISSN:2331-8422
DOI:10.48550/arxiv.0610427