Dendritic magnetic avalanches in carbon-free MgB2 thin films with and without a deposited Au layer -: art. no. 152501

被引：41

作者：

Choi, EM ^{[1
]}

Lee, HS

Kim, HJ

Kang, B

Lee, SI

Olsen, AAF

Shantsev, DV

Johansen, TH

机构：

[1] Pohang Univ Sci & Technol, Dept Phys, Natl Creat Res Initiat Ctr Superconduct, Pohang 790784, South Korea

[2] Korea Basic Sci Inst, Quantum Mat Res Lab, Taejon 305333, South Korea

[3] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

[4] Univ Houston, Texas Ctr Superconduct & Adv Mat, Houston, TX 77204 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 15期

关键词：

D O I：

10.1063/1.2084323

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

From magneto optic images (MOI), the dendritic magnetic avalanche is known to appear dominantly for thin films of the newly discovered MgB2. To clarify the origin of this phenomenon, we studied in detail the MOI of carbon-free MgB2 thin films with and without a deposited gold layer. The MOI indicated that carbon contamination was not the main source of the avalanche. The MOI clearly showed that the deposition of metallic gold on top of a MgB2 thin film improved its thermal stability and suppressed the sudden appearance of the dendritic flux avalanche. This is consistent with the previous observation of flux noise in the magnetization. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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