Synthesis and Mossbauer study of maghemite nanowire arrays

被引：4
|
作者：
Xue, DS [1 ]
Zhang, LY [1 ]
Li, FS [1 ]
机构：
[1] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China
来源：
HYPERFINE INTERACTIONS | 2004年 / 156卷 / 01期
关键词：
maghemite; nanowires; Mossbauer spectrum;
D O I：
10.1023/B:HYPE.0000043214.36740.70
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：
Arrays of gamma-Fe2O3 nanowire were synthesized in anodic aluminum oxide templates. The structure, morphology and magnetic property at room temperature were characterized. Temperature-dependent Mossbauer spectra was collected and the superparamagnetic relaxation was clearly observed. Both hyperfine field and isomer shift increase with decreasing temperature. The anisotropy energy constant is determined from the reduction of the hyperfine field relative to the saturation value caused by the collective magnetic excitations.
引用
收藏
页码：41 / 46
页数：6
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