Magnetization reversal in elongated Fe nanoparticles -: art. no. 21445

被引：18

作者：

Li, YQ ^{[1
]}

Xiong, P

von Molnár, S

Ohno, Y

Ohno, H

机构：

[1] Florida State Univ, MARTECH, Tallahassee, FL 32306 USA

[2] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[3] Tohoku Univ, Elect Commun Res Inst, Lab Nanoelect & Spintron, Sendai, Miyagi 980, Japan

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 21期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.71.214425

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetization reversal of individual, isolated high-aspect-ratio Fe nanoparticles with diameters comparable to the magnetic exchange length is studied by high-sensitivity submicron Hall magnetometry. For a Fe nanoparticle with diameter of 5 nm, the magnetization reversal is found to be an incoherent process with localized nucleation assisted by thermal activation, even though the particle has a single-domain static state. For a larger elongated Fe nanoparticle with a diameter greater than 10 nm, the inhomogeneous magnetic structure of the particle plays important role in the reversal process.

引用

页数：6

共 30 条

[1]

Aharoni A., 1996, Introduction to the Theory of Ferromagnetism

[2] Submicrometer ferromagnetic NOT gate and shift register [J].