Magnetostriction of HTSC single crystals
- 41 Downloads
We have measured the sample length change of HTSC single crystals in the superconducting state in a magnetic field. The magnetic field was applied parallel to the crystallinec-axis direction and was swept at a constant rate of 10 mT/s up to 6 T. The sample length change was measured along theab-plane direction, i.e., perpendicular to the field. We have found for the Bi2Sr2CaCu2O8 single crystals that the relative sample length change (ΔL/L) is extraordinarily large for a superconductor, on the order of 10−4. For the case of (La1−xSr x )2CuO4, the amount of magnetostriction was not as large as for the Bi system, but the magnetostriction curves had many similarities. For both compounds, a relaxation phenomenon was observed when the field sweep was suspended at a certain field value. These observations are discussed in relation to flux line pinning.
Key wordsMagnetostriction pinning effect flux creep HTSC single crystals
Unable to display preview. Download preview PDF.
- 1.G. Brändli and R. Griessen,Cryogenics 13, 299 (1973).Google Scholar
- 2.E. du Tremolet de Lacheisserie, B. Barbara, and J. H. Henry,J. Magn. Magn. Mater. 71, L125 (1988).Google Scholar
- 3.M. Braden, P. Böhm, F. Seidler, H. Kalenborn, and D. Wohlleben,Z. Phys. B: Cond. Matter 79, 173 (1990).Google Scholar
- 4.H. Ikuta, N. Hirota, Y. Nakayama, K. Kishio, and K. Kitazawa,Phys. Rev. Lett. 70, 2166 (1993).Google Scholar