HYPERFINE FIELD, CONCENTRATION AND MAGNETIC-ANISOTROPY DISTRIBUTIONS IN AMORPHOUS COB, COP ALLOYS, A NMR-STUDY

被引：19

作者：

PANISSOD, P ^{[1
]}

QACHAOU, A ^{[1
]}

DURAND, J ^{[1
]}

HASEGAWA, R ^{[1
]}

机构：

[1] ALLIED CHEM CORP,MAT RES CTR,MORRISTOWN,NJ 07960

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH | 1982年 / 199卷 / 1-2期

关键词：

531 Metallurgy and Metallography - 701 Electricity and Magnetism - 801 Chemistry - 804 Chemical Products Generally - 942 Electric and Electronic Measuring Instruments;

D O I：

10.1016/0167-5087(82)90207-1

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The Co**5**9 NMR (nuclear magnetic resonance) spectra in rapidly quenched CoB and electrodeposited CoP amorphous alloys exhibit structures which were found to be very sensitive to the excitation rf field strength. The thorough study of this effect shows that there exists a domain wall mobility distribution in these samples which is closely related to concentration fluctuations. The density of ″structural defects″ that pin the dws (domain wall stiffness) is highest in regions where the average concentration is close to the eutectic composition, while dws move more freely in regions where the average concentration is higher or lower than this composition. Regions of eutectic composition are tentatively identified as zones of highest perpendicular easy axis anisotropy. The particular role of the eutectic composition is emphasized by the concentration dependence of the NMR signal intensity and the effect of annealing treatment; a phase separation is suggested for that composition.

引用

页码：231 / 235

页数：5

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