Superconducting anisotropy in single-crystalline Ba(Fe 0.93Co0.07)2As2 near Tc

T. Nojima; Y. Honda; Y. Nakajima; T. Tamegai

doi:10.1016/j.physc.2009.11.090

Superconducting anisotropy in single-crystalline Ba(Fe _0.93Co_0.07)₂As₂ near T_c

T. Nojima, Y. Honda, Y. Nakajima, T. Tamegai

Institute for Materials Research (IMR)

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

2 Citations (Scopus)

Abstract

The superconducting anisotropy γ has been studied on single-crystalline Ba(Fe_0.93Co_0.07)₂As ₂ (Tc=22.5K) at temperatures T≥20K and fields H≤10T by measuring magnetic torque τ as a function of angle θ between the c axis and the H direction. The reversible part in τ(θ) can be well-described with γ=3-3.5, which is almost T and H independent within the measurement range. The result manifests that this material, known as the multigap superconductor, behaves as a simple anisotropic superconductor at least near Tc. The irreversible part in τ(θ) shows broad peak at θ=90°, indicating the absence of strong layer pinning.

Original language	English
Pages (from-to)	S813-S814
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.11.090
Publication status	Published - 2010 Dec

Keywords

122-Type iron pnictides
Anisotropy
Torque magnetometry

ASJC Scopus subject areas

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

Access to Document

10.1016/j.physc.2009.11.090

Cite this

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title = "Superconducting anisotropy in single-crystalline Ba(Fe 0.93Co0.07)2As2 near Tc",

abstract = "The superconducting anisotropy γ has been studied on single-crystalline Ba(Fe0.93Co0.07)2As 2 (Tc=22.5K) at temperatures T≥20K and fields H≤10T by measuring magnetic torque τ as a function of angle θ between the c axis and the H direction. The reversible part in τ(θ) can be well-described with γ=3-3.5, which is almost T and H independent within the measurement range. The result manifests that this material, known as the multigap superconductor, behaves as a simple anisotropic superconductor at least near Tc. The irreversible part in τ(θ) shows broad peak at θ=90°, indicating the absence of strong layer pinning.",

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T1 - Superconducting anisotropy in single-crystalline Ba(Fe 0.93Co0.07)2As2 near Tc

AU - Nojima, T.

AU - Honda, Y.

AU - Nakajima, Y.

AU - Tamegai, T.

PY - 2010/12

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AB - The superconducting anisotropy γ has been studied on single-crystalline Ba(Fe0.93Co0.07)2As 2 (Tc=22.5K) at temperatures T≥20K and fields H≤10T by measuring magnetic torque τ as a function of angle θ between the c axis and the H direction. The reversible part in τ(θ) can be well-described with γ=3-3.5, which is almost T and H independent within the measurement range. The result manifests that this material, known as the multigap superconductor, behaves as a simple anisotropic superconductor at least near Tc. The irreversible part in τ(θ) shows broad peak at θ=90°, indicating the absence of strong layer pinning.

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