Giant magnetostriction in Bi2Sr2CaCu2O8 single crystal in the superconducting state and its mechanism

H. Ikuta; N. Hirota; Y. Nakayama; K. Kishio; K. Kitazawa

doi:10.1103/PhysRevLett.70.2166

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Giant magnetostriction in Bi2Sr2CaCu2O8 single crystal in the superconducting state and its mechanism

H. Ikuta, N. Hirota, Y. Nakayama, K. Kishio, K. Kitazawa

DOI 10.1103/PhysRevLett.70.2166 · Physical Review Letters

T1

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Abstract

Unusually large magnetostriction for a superconductor was found in a single crystal of the high-Tc cuprate Bi2Sr2CaCu2O8. The sample length change was measured along the ab plane under magnetic fields applied up to 6 T parallel to the c axis. The sample decreased in length during the field increasing process and with relative change exceeding 10−4 at 4.8 K. A quantitative model has been proposed which accounts for the magnetostriction in terms of internal forces arising from flux pinning. These observations show that magnetostriction measurement is a novel and unique technique to investigate the pinning effect and related phenomena in type-II superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown