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Asymmetric Field Profile in Bose Glass Phase of Irradiated YBa2Cu3O7-d: Loss of Interlayer Coherence around 1/3 of Matching Field

K. Itaka·T. Shibauchi·M. Yasugaki·T. Tamegai·S. Okayasu
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Abstract

Magneto-optical imaging in YBa2Cu3O7-d with tilted columnar defects (CD's) shows an asymmetric critical-state field profile. The observed hysteretic shift of the profile ridge (trough) from the center of the sample is explained by in-plane magnetization originated from vortex alignment along CD's. The extracted ratio of the in-plane to out-of-plane magnetization component has a maximum at 1/5 of matching field ($B_Φ$) and disappears above $B_Φ/3$, suggesting a reduction of interlayer coherence well bellow $B_Φ$ in the Bose glass phase. Implications are discussed in comparison with the vortex liquid recoupling observed in irradiated Bi2Sr2CaCu2O8+y.

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K. Itaka, T. Shibauchi, M. Yasugaki, T. Tamegai, S. Okayasu. 2001-04-12. Asymmetric Field Profile in Bose Glass Phase of Irradiated YBa2Cu3O7-d: Loss of Interlayer Coherence around 1/3 of Matching Field. https://doi.org/10.1103/physrevlett.86.5144

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