Magnetic anisotropy in arrays of nanometer-scale iron particles

Author

Wirth, Steffen ; Heremans, Jean J. ; Von Molnar, Stephan ; Field, Mark ; Campman, Ken L. ; Gossard, Art C. ; Awschalom, David D.

Author_Institution

Florida State Univ., Tallahassee, FL, USA

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1105

Lastpage

1107

Abstract

Arrays of ferromagnetic iron particles have been fabricated by a combination of chemical vapor deposition and scanning tunneling microscopy. Hall magnetometry and MFM measurements have been used to determine their magnetic properties. The measured switching fields indicate magnetization reversal by curling from which an exchange length, λ_ex=3.1 nm, may be estimated. The cylindrically shaped particles have an easy magnetization direction (EMD) along their long axis due to shape anisotropy. The magnetic anisotropy is evaluated by fitting calculated magnetization curves to those measured with applied field perpendicular to the particles EMD

Keywords

exchange interactions (electron); ferromagnetic materials; iron; magnetic anisotropy; magnetic particles; magnetisation reversal; nanostructured materials; 3.1 nm; Fe; Hall magnetometry; MFM measurements; chemical vapor deposition; cylindrically shaped particles; easy magnetization direction; exchange length; ferromagnetic; magnetic anisotropy; magnetization reversal; nanometer-scale Fe particles arrays; scanning tunneling microscopy; shape anisotropy; switching fields; Chemical vapor deposition; Iron; Length measurement; Magnetic anisotropy; Magnetic field measurement; Magnetic force microscopy; Magnetic properties; Magnetization; Perpendicular magnetic anisotropy; Tunneling;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706382

Filename

706382