MAGNETIC-RELAXATION IN NANOCRYSTALLINE IRON-OXIDES

被引：27

作者：

JING, J

ZHAO, F

YANG, X

GONSER, U

机构：

[1] FB 12.1 Werkstoffwissenschaften, Universität des Saarlandes, Saarbrücken

来源：

HYPERFINE INTERACTIONS | 1990年 / 54卷 / 1-4期

关键词：

D O I：

10.1007/BF02396092

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Nanocrystalline Fe oxides are compacted solids of fine particles. By compacting interfaces are formed between adjacent particles. Since collective magnetic relaxation and superparamagnetism depend on the anisotropic energy, it is expected that the existence of interfaces and related interface anisotropy will change the relaxation behavior of nanocrystalline Fe oxides. Measurements on nanocrystalline α-Fe2O3 and γ-Fe2O3 have shown that the exchange interaction in the interfaces is more effective in suppressing superparamagnetic relaxation upon compacting than the dipole interaction. © 1990 J.C. Baltzer A.G. Scientific Publishing Company.

引用

页码：571 / 575

页数：5

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[3]

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[5]

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