Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-50121
Bosma, S; Weyeneth, S; Puzniak, R; Erb, A; Schilling, A; Keller, H (2011). Magnetic torque study of the temperature-dependent anisotropy parameter in overdoped superconducting single-crystal YBa2Cu3O7. Physical Review B, 84(2):024514.
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An overdoped YBa2Cu3O7 single crystal was studied by SQUID and torque magnetometry in order to investigate the temperature dependence of the anisotropy parameter close to the transition temperature Tc (0.87Tc<T<Tc). Angle-dependent torque measurements were performed and analyzed with the widely used Kogan model [ Phys. Rev. B 38 7049 (1988)] as well as with an extended model by Hao and Clem [ Phys. Rev. Lett. 67 2371 (1991)], taking into account the influence of the vortex cores on the magnetization. Both approaches yield similar results, with an out-of-plane anisotropy parameter around 6.5 which slightly increases with decreasing temperature, and a temperature independent in-plane anisotropy parameter γab=1.12(5).
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|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Physics Institute|
|Deposited On:||24 Oct 2011 13:18|
|Last Modified:||30 Nov 2013 08:12|
|Publisher:||American Physical Society|
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