ELASTIC ANOMALY OF YBA2CU3O7-DELTA AT THE SUPERCONDUCTING TRANSITION

被引：2

作者：

ABDSHUKOR, R

机构：

[1] Department of Physics, Universiti Kebangsaan Malaysia, Bangi, Selangor

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1992年 / 31卷 / 8A期

关键词：

SHEAR MODULUS; HIGH TC SUPERCONDUCTORS; YBA2CU3O7-DELTA; SECOND-SHEAR-STRESS-DERIVATIVES OF THE TRANSITION TEMPERATURE; X-RAY DIFFRACTION; RESISTANCE;

D O I：

10.1143/JJAP.31.L1034

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The relative change in shear ultrasonic velocity in single phased YBa2Cu3O7-delta (delta=0.02) polycrystalline high T(c) superconductor has been determined using the phase detection technique. The shear velocity was found to increase at a greater rate below the zero-resistance temperature (T(c) = 90 K) and showed a slope discontinuity (d/dT [DELTA-v(s)/v(s)]) of 84 ppm/K. Using experimental value of the discontinuity in the specific heat at T(c), the second shear-stress-derivatives of the transition temperature (partial derivative2 T(c)/partial derivative2) is estimated to be 0.06 K/(kbar2).

引用

页码：L1034 / L1036

页数：3

共 16 条

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