PHONON SOFTENING IN AU-49.5 AT PERCENT-CD ALLOY

被引：56

作者：

OHBA, T

SHAPIRO, SM

AOKI, S

OTSUKA, K

机构：

[1] UNIV TSUKUBA,INST MAT SCI,TSUKUBA,IBARAKI 305,JAPAN

[2] BROOKHAVEN NATL LAB,UPTON,NY 11973

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1994年 / 33卷 / 11B期

关键词：

AU-CD ALLOY; BETA-PHASE ALLOY; NEUTRON DIFFRACTION; PHONON SOFTENING; PHONON DISPERSION CURVE; ISOTOPE CD-114; MARTENSITIC TRANSFORMATION;

D O I：

10.1143/JJAP.33.L1631

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Phonon softening was observed in the parent phase of a AuCd alloy which transforms from the beta2(B2) parent to zeta2'(trigonal) martensite at M(s) = 304 K. Since Cd strongly absorbs neutrons, the isotope Cd-114 was used in preparing the single crystal for the measurements. The [zetazeta0]TA2(uparallel[11BAR0]) phonon branch was measured and found to be anomalously low. A minimum is present at zeta = 0.35 which softens as M(s) approaches from above. The results are consistent with the model proposed by Ohba et al. [Materials Trans. JIM 33 (1992) 29] based upon a crystallographic study of the zeta2' phase.

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收藏

页码：L1631 / L1633

页数：3

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