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

Abstract

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.

6 pages, 9 figures, to be published in J. Phys. Soc. Jpn. (2006)

References in corpus (2)

• Evidence for Magnetic Ordering Associated with Metal-Insulator Transition in SmRu4P12 Studied by Muon Spin Relaxation
• Metal-insulator transition in PrRu${}_4$P${}_{12}$ and SmRu${}_4$P${}_{12}$ investigated by optical spectroscopy

Cited by in corpus (4)

• Multipole Susceptibility of Multiorbital Anderson Model Coupled with Jahn-Teller Phonons
• 31P-NMR and muSR Studies of Filled Skutterudite Compound SmFe4P12: Evidence for Heavy Fermion Behavior with Ferromagnetic Ground State
• Atomic displacements and lattice distortion in the magnetic-field-induced charge ordered state of SmRu${}_4$P${}_{12}$
• Isotropic parallel antiferromagnetism in the magnetic-field-induced charge-ordered state of SmRu${}_4$P${}_{12}$ caused by $p$-$f$ hybridization