NMR study of quaternary superconductor RM2B2C (R = Y, La, Th, and M = Ni, Pd, Pt)
Ruthenides and Borocarbides
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Abstract
195Pt-,139La- and11B-NMR have been investigated in quaternary RM2B2C (R=Y, La, Th and M=Ni, Pd, Pt). The electric quadrupole frequency of139La changes more than 5 times in magnitude from M=Ni to Pt, indicating that the hybridization of La-5d and d-electrons of M-element changes largely. The analysis of11B and139La spectra shows also the large change of the magnetic anisotropy with R and M element, i.e., χII c>χII ab in LaNi2B2C, but χII c>χII ab YNi2B2C.The data of T1T and K of195Pt and11B are consistent with the band effects and with no evidence of strong antiferromagnetic correlation effects.
PACS numbers
76.60−k 74.70−bPreview
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© Plenum Publishing Corporation 1996