Abstract
An approach to the characterization of the high-Tc fine particles was presented using an electron spin resonance (ESR) method on powder mixtures of high-Tc cuprates and paramagnetic species.
R-Ba-Cu-O (R=Y,Eu,Gd) were synthesized by the sol-gel method and resistivity vs. temperature measurements were done by bulk oxides (Tc=91–93 K). ESR absorption was obtained with a powder mixture of a small amount of Cr3+ contained MgO and the ground high-Tc cuprates. Line broadening of Cr3+ has been observed at temperature lower than Tc of the bulk oxide. The results indicate that there was a pronounced decrease of Tc when the particle size was reduced.
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© 1991 Springer-Verlag Tokyo
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Kaise, M., Kondo, H., Mizuno, M., Nishihara, C., Nozoye, H., Shindo, H. (1991). Electron Spin Resonance Study of Paramagnetic Species Coexisted with the Fine Particles of the R-Ba-Cu-O (R=Y,Eu,Gd) Superconductors. In: Kajimura, K., Hayakawa, H. (eds) Advances in Superconductivity III. Springer, Tokyo. https://doi.org/10.1007/978-4-431-68141-0_34
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DOI: https://doi.org/10.1007/978-4-431-68141-0_34
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-68143-4
Online ISBN: 978-4-431-68141-0
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