ISSN:
1573-7357
Keywords:
76.60.Ge
;
74.72.Bk
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The interplane (cb) and intraplane (ab) anisotropy of untwinned YBa2 Cu307 single crystals has been investigated by means of the torque magnetometry. To extract the reversible and irreversible components, the torque was measured as a function of increasing angle as well as decreasing angle. The interplane irreversible torque Γirr shows two-fold peaks at θc =90 ° and270 ° (of half width11 ° at77 K) due to the well-known intrinsic interplane pinning. A novel intrinsic pinning has been discovered in the intraplane irreversible torque, i.e., Γirr shows four-fold peaks of half width20° at77 K when θa =0 °, 90 °, 180 ° and270 °. We argue that the intrinsic intraplane pinning comes from the four-fold nature of the gap parameter.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00753857
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