9Be-NMR studies of the heavy-Fermion superconductor UBe13

Field-angle dependence of 9Be-NMR measurements has been carried out for a single crystal UBe13 in the temperature range of 0.35-1.5K. For , we observed that 9Be-NMR spectra consisted of 10 lines; one line comes from a Be(I) site located in the cubic symmetry, while nine lines come from Be(II) sites...

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Bibliographic Details
Main Authors: TOU, H, TSUGAWA, N, SERA, M, HAGA, Y, NUKI, Y
Format: Conference Proceeding
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Heavy-fermion superconductors
Physics
Properties of type I and type II superconductors
Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.)
Superconducting materials (excluding high-tc compounds)
Superconductivity
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Summary:Field-angle dependence of 9Be-NMR measurements has been carried out for a single crystal UBe13 in the temperature range of 0.35-1.5K. For , we observed that 9Be-NMR spectra consisted of 10 lines; one line comes from a Be(I) site located in the cubic symmetry, while nine lines come from Be(II) sites located in the lower symmetry. From the field angle dependence of the NMR spectra, we determined NQR parameters such as the nuclear quadrupole frequency and the asymmetry parameter (eta{approximately equal to}0.21). In the superconducting state, we found that 9Be-NMR Knight shift for does not change at all. This result is consistent with the spin-triplet pairing state in UBe13.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2006.10.271