Positive magnetoconductance in YBa2(Cu0.9Fe0.1)3Oy and YBa2(Cu0.85Fe0.15)3Oy

A. Matsushita; H. Aoki; T. Matsumoto

doi:10.1016/0921-4534(90)90559-W

Positive magnetoconductance in YBa₂(Cu_0.9Fe_0.1)₃O_y and YBa₂(Cu_0.85Fe_0.15)₃O_y

A. Matsushita, H. Aoki, T. Matsumoto

Science

Research output: Contribution to journal › Article › peer-review

Abstract

The magnetoconductance was investigated for the superconductor YBa₂(Cu_0.9Fe_0.1)₃O_y (Fe10) at various temperatures above T_c and for the non-superconductor YBa₂(Cu_0.85Fe_0.15)₃O_y (Fe15) below 4.2 K. In Fe10 the magnetoconductance is negative above 211 K, while it is positive below 70 K where the temperature coefficient of the resistivity (TCR) is negative. The positive magnetoconductance observed in Fe10 shows a H² dependence at lower magnetic fields. In Fe15 the magnetoconductance is negative at lower magnetic fields and turns to positive at higher magnetic fields of more than 2-3 T, and a H² dependence is not observed. These types of behavior can be explained by a two-dimensional Anderson localization occuring at the CuO₂ plane.

Original language	English
Pages (from-to)	100-104
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	166
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(90)90559-W
Publication status	Published - 1990 Mar 1

ASJC Scopus subject areas

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

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title = "Positive magnetoconductance in YBa2(Cu0.9Fe0.1)3Oy and YBa2(Cu0.85Fe0.15)3Oy",

abstract = "The magnetoconductance was investigated for the superconductor YBa2(Cu0.9Fe0.1)3Oy (Fe10) at various temperatures above Tc and for the non-superconductor YBa2(Cu0.85Fe0.15)3Oy (Fe15) below 4.2 K. In Fe10 the magnetoconductance is negative above 211 K, while it is positive below 70 K where the temperature coefficient of the resistivity (TCR) is negative. The positive magnetoconductance observed in Fe10 shows a H2 dependence at lower magnetic fields. In Fe15 the magnetoconductance is negative at lower magnetic fields and turns to positive at higher magnetic fields of more than 2-3 T, and a H2 dependence is not observed. These types of behavior can be explained by a two-dimensional Anderson localization occuring at the CuO2 plane.",

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AU - Aoki, H.

AU - Matsumoto, T.

PY - 1990/3/1

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N2 - The magnetoconductance was investigated for the superconductor YBa2(Cu0.9Fe0.1)3Oy (Fe10) at various temperatures above Tc and for the non-superconductor YBa2(Cu0.85Fe0.15)3Oy (Fe15) below 4.2 K. In Fe10 the magnetoconductance is negative above 211 K, while it is positive below 70 K where the temperature coefficient of the resistivity (TCR) is negative. The positive magnetoconductance observed in Fe10 shows a H2 dependence at lower magnetic fields. In Fe15 the magnetoconductance is negative at lower magnetic fields and turns to positive at higher magnetic fields of more than 2-3 T, and a H2 dependence is not observed. These types of behavior can be explained by a two-dimensional Anderson localization occuring at the CuO2 plane.

AB - The magnetoconductance was investigated for the superconductor YBa2(Cu0.9Fe0.1)3Oy (Fe10) at various temperatures above Tc and for the non-superconductor YBa2(Cu0.85Fe0.15)3Oy (Fe15) below 4.2 K. In Fe10 the magnetoconductance is negative above 211 K, while it is positive below 70 K where the temperature coefficient of the resistivity (TCR) is negative. The positive magnetoconductance observed in Fe10 shows a H2 dependence at lower magnetic fields. In Fe15 the magnetoconductance is negative at lower magnetic fields and turns to positive at higher magnetic fields of more than 2-3 T, and a H2 dependence is not observed. These types of behavior can be explained by a two-dimensional Anderson localization occuring at the CuO2 plane.

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Positive magnetoconductance in YBa₂(Cu_0.9Fe_0.1)₃O_y and YBa₂(Cu_0.85Fe_0.15)₃O_y

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