Disorder Effect on the Vortex Pinning by the Cooling-Process Control in the Organic Superconductor .KAPPA.-(BEDT-TTF)2Cu[N(CN)2]Br
-
- Yoneyama Naoki
- Institute for Materials Research, Tohoku University
-
- Sasaki Takahiko
- Institute for Materials Research, Tohoku University
-
- Nishizaki Terukazu
- Institute for Materials Research, Tohoku University
-
- Kobayashi Norio
- Institute for Materials Research, Tohoku University
Bibliographic Information
- Other Title
-
- Disorder Effect on the Vortex Pinning by the Cooling-Process Control in the Organic Superconductor κ-(BEDT-TTF)<sub>2</sub>Cu[N(CN)<sub>2</sub>]Br
Abstract
We investigate the influence of disorders in terminal ethylene groups of BEDT-TTF molecules (ethylene-disorders) on the vortex pinning of the organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br. Magnetization measurements are performed under different cooling-processes. The second peak in the magnetization hysteresis curve is observed for all samples studied, and the hysteresis width of the magnetization becomes narrower by cooling faster. In contradiction to the simple pinning effect of disorder, this result shows the suppression of the vortex pinning force by introducing more ethylene-disorders. The ethylene-disorder domain model is proposed for explaining the observed result. In the case of the system containing a moderate number of the ethylene-disorders, the disordered molecules form a domain structure and it works as an effective pinning site. On the contrary, an excess number of the ethylene-disorders may weaken the effect of the domain structure, which results in the less effective pinning force on the vortices.
Journal
-
- Journal of the Physical Society of Japan
-
Journal of the Physical Society of Japan 73 (1), 184-189, 2004
THE PHYSICAL SOCIETY OF JAPAN
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390282679163485440
-
- NII Article ID
- 130004538509
- 210000104916
-
- BIBCODE
- 2004JPSJ...73..184Y
-
- ISSN
- 13474073
- 00319015
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed