Anisotropy of Superconducting MgB{sub 2} as Seen in Electron Spin Resonance and Magnetization Data
Journal Article
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· Physical Review Letters
- and others
We observed the conduction electron spin resonance (CESR) in fine powders of MgB{sub 2} both in the superconducting and normal states. The Pauli susceptibility is {chi}{sub s}=2.0 x 10{sup -5} emu/mole in the temperature range of 450 to 600 K . The spin relaxation rate has an anomalous temperature dependence. The CESR measured below T{sub c} at several frequencies suggests that MgB{sub 2} is a strongly anisotropic superconductor with the upper critical field, H{sub c2} , ranging between 2 and 16 T . The high-field reversible magnetization data of a randomly oriented powder sample are well described assuming that MgB{sub 2} is an anisotropic superconductor with H{sup ab}{sub c2}/H{sup c}{sub c2}{approx}6-- 9 .
- Research Organization:
- Ames National Laboratory
- Sponsoring Organization:
- (US)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 40277207
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 87; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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