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Observation of the peak effect at high fields in single crystalline YBa2Cu4O8

โœ Scribed by N. Harrison; J. Vanacken; A.S. Lagutin; F. Herlach

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
196 KB
Volume
211
Category
Article
ISSN
0921-4526

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โœฆ Synopsis

The peak effect in the magnetic hysteresis of an untwinned YBa2Cu4Os single crystal has been measured at temperatures down to 5 K, using a high sensitivity susceptometer in pulsed magnetic fields up to 50 T. The pยขak effect is due to an increase of the flux pinning as the magnetic field increases and results in a magnetisation hysteresis !oop in the shape of a fishtail. The observed peak in the M(H) curve shows a clear temperature dependence in that the f~eld B,~ax at which the peak occurs increases with decreasing temperature.

๐Ÿ“œ SIMILAR VOLUMES

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The transition temperature of \(\mathrm{YBa}_{2} \mathrm{Cu}_{4} \mathrm{O}_{8}(124)\) is increased by about \(10 \mathrm{~K}\) by doping with calcium, whereas Ca substitution in \(\mathrm{Y}_{2} \mathrm{Ba}_{4} \mathrm{Cu}_{7} \mathrm{O}_{14+x}\) (247) has no effect on \(T_{\mathrm{c}}\). X-ray str