Superconducting fluctuation in Ba2[Y,Ln]Cu3O7 measured by magnetoresistance

Azusa Matsuda; Takao Ishii; Kyoichi Kinoshita; Tomoaki Yamada

doi:10.1016/0921-4534(89)91060-5

Superconducting fluctuation in Ba₂[Y,Ln]Cu₃O₇ measured by magnetoresistance

Azusa Matsuda, Takao Ishii, Kyoichi Kinoshita, Tomoaki Yamada

研究成果: Article › 査読

1 被引用数 (Scopus)

抄録

Magnetoresistance of polycrystalline Ba₂YCu₃O₇ and Ba₂Y_1-xLn_xCu₃O₇ (Ln=Pr,Ho,Gd, or Eu) are measured from Tc to 230 K. All the samples show large positive magnetoresistance arising from superconducting fluctuation. The temperature dependence is well-described by the recently developed theory which includes the Zeeman contribution of the Maki-Thompson-term. in pure samples, the coherence lengths along the ab axis and c axis are 12 Å and 2 Å, respectively. The phase relaxation time is estimated to be 2×10^-13 sec at 100 K. Only Pr substitution shortens the phase relaxation time, indicating the pair breaking nature of the Pr ion.

本文言語	English
ページ（範囲）	371-372
ページ数	2
ジャーナル	Physica C: Superconductivity and its applications
巻	162-164
号	PART 1
DOI	https://doi.org/10.1016/0921-4534(89)91060-5
出版ステータス	Published - 1989 12
外部発表	はい

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

文献へのアクセス

10.1016/0921-4534(89)91060-5

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引用スタイル

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abstract = "Magnetoresistance of polycrystalline Ba2YCu3O7 and Ba2Y1-xLnxCu3O7 (Ln=Pr,Ho,Gd, or Eu) are measured from Tc to 230 K. All the samples show large positive magnetoresistance arising from superconducting fluctuation. The temperature dependence is well-described by the recently developed theory which includes the Zeeman contribution of the Maki-Thompson-term. in pure samples, the coherence lengths along the ab axis and c axis are 12 {\AA} and 2 {\AA}, respectively. The phase relaxation time is estimated to be 2×10-13 sec at 100 K. Only Pr substitution shortens the phase relaxation time, indicating the pair breaking nature of the Pr ion.",

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AB - Magnetoresistance of polycrystalline Ba2YCu3O7 and Ba2Y1-xLnxCu3O7 (Ln=Pr,Ho,Gd, or Eu) are measured from Tc to 230 K. All the samples show large positive magnetoresistance arising from superconducting fluctuation. The temperature dependence is well-described by the recently developed theory which includes the Zeeman contribution of the Maki-Thompson-term. in pure samples, the coherence lengths along the ab axis and c axis are 12 Å and 2 Å, respectively. The phase relaxation time is estimated to be 2×10-13 sec at 100 K. Only Pr substitution shortens the phase relaxation time, indicating the pair breaking nature of the Pr ion.

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