Anisotropy of superconducting MgB2 as seen in electron spin resonance and magnetization data

F. Simon, A. Jánossy, T. Fehér, F. Murányi, S. Garaj, L. Forró, C. Petrovic, S. L. Bud'ko, G. Lapertot, V. G. Kogan, P. C. Canfield

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Abstract

A study of the anisotropic effects of superconducting MgB2 was performed. The analysis was performed using electron spin resonance (ESR) and magnetization data. It was observed that conduction ESR (CESR) existed in normal and superconducting states of fine powders of MgB2. The Pauli susceptibility was found to be 2.0×10-5 emu/mole and the spin relaxation rate was found to be anomalous temperature dependent. The CESR measurements and magnetization data proved the anisotropic nature of the superconductor with an uppercritical field. The upper critical field was between 2 and 16 T for CESR and between 6-9 for magnetization data.

Original languageEnglish
Article number047002
Pages (from-to)470021-470024
Number of pages4
JournalPhysical review letters
Volume87
Issue number4
Publication statusPublished - Jul 23 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Simon, F., Jánossy, A., Fehér, T., Murányi, F., Garaj, S., Forró, L., Petrovic, C., Bud'ko, S. L., Lapertot, G., Kogan, V. G., & Canfield, P. C. (2001). Anisotropy of superconducting MgB2 as seen in electron spin resonance and magnetization data. Physical review letters, 87(4), 470021-470024. [047002].