Disordered magnetism at the grain boundary of pure nanocrystalline iron

被引：138

作者：

Bonetti, E

Del Bianco, L

Fiorani, D

Rinaldi, D

Caciuffo, R

Hernando, A

机构：

[1] Univ Bologna, Ist Nazl Fis Mat, I-40127 Bologna, Italy

[2] Univ Bologna, Dipartimento Fis, I-40127 Bologna, Italy

[3] CNR, Ist Chim Mat, I-00016 Rome, Italy

[4] Univ Ancona, Ist Nazl Fis Mat, I-60131 Ancona, Italy

[5] Univ Ancona, Dipartimento Sci Mat & Terra, I-60131 Ancona, Italy

[6] Inst Magnetismo Aplicado UCM Renfe, E-28230 Madrid, Spain

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.83.2829

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The low-temperature magnetic behavior of ball-milled nanocrystalline Fe is reported. The results of de and ac susceptibility, remanence, and magnetic relaxation measurements indicate a transition from a high-temperature ferromagnetic state to a low-temperature disordered regime, where a collective freezing of the crystallites magnetic moments occurs. It is proposed that the behavior is determined by the presence of the structurally disordered grain boundaries, showing spin-glass-like properties.

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页码：2829 / 2832

页数：4

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