-
摘要: 本文研究了Zr70Cu30非晶合金在压力下低于玻璃化温度退火时,表征结构中几何短程有序化过程的超导转变温度(Tc)的弛豫行为。结果表明,结构弛豫使Tc下降。压力退火则阻碍Tc的热弛豫下降趋势,但过程的动力学仍保持和常压弛豫相似的对数特征。作者应用压力促使非晶结构中局域张应力减小的观点来解释上述现象。Abstract: The relaxation behavior of superconducting transition temperature (Tc), which to a great extent may characterize the geometric short-range ordering process in amorphous alloys was examined on Zr70Cu30 metglas on pressure annealing below its gasification temperature. The obtained results show that Tc degradates on raising of annealing temperature and prolongation of tempering. Pressure shows a relation effect to Tc relaxation process, while it still remain a logarithmic character in kinetics as at normal pressure. This behavior could be explained by the reduction of local expanded region in amorphous structure during external pressing.
-
Yousuf M, et al. J Mater Sci Lett, 1984, 3: 149. Slawska-Waniewska A, et al. IEEE Trans Magn Mag, 1984, 20: 1391. Shen Zhong-yi, et al. Chin Phys Lett, 1986, 3: 317. Inoue A, et al. J Mater Sci, 1985, 20: 2323. Altounian Z, et al. Solid State Comm, 1981, 40: 221. Poon S J. In: Amorphous Metallic Alloys. ed. by F E Luborsky. Butterworths, London, 1983: 446. 张云, 沈中毅, 殷岫君, 等. 物理, 1984, 13: 742. Schulz R, et al. J Non-Cryst Solids, 1984, 61-62: 997. Gibbs M R J, Evetts J E. In: Rapidly Quenched Metals Ⅳ. ed by T Matsumoto, K Suzuki. Jpn Inst Metals Sendai, 1981: 479. Egami T. Ann New York Acad Sci, 1981, 371: 238. Suhl H, et al. Phys Rev Lett, 1980, 45: 1707. Poon S J. Phys Rev B, 1983, 27: 5519. 洪景新, 沈中毅, 张云, 等. 物理学报, 1987, 36: 1313. Girifalco L A. In: Metallurgy at High Pressure and High Temperature. ed by Jr Gschneidner, et al. Gordon Breach Science Publishers, 1964. 沈中毅, 洪景新, 殷岫君, 等. 物理学报, 1988, 37: 283. Sonnberger R, et al. Rapidly Quneched Metals Ⅴ. ed by S Steeb, H Warlimont. Elsevier Science Publishers, 1985: 703.
点击查看大图
计量
- 文章访问数: 7734
- HTML全文浏览量: 352
- PDF下载量: 612