Formation of an anisotropy lattice in Co/Pt multilayers by direct laser interference patterning

Aliekber Aktag; Steven Michalski; Lanping Yue; Roger D. Kirby; Sy Hwang Liou

doi:10.1063/1.2191747

Formation of an anisotropy lattice in Co/Pt multilayers by direct laser interference patterning

Aliekber Aktag, Steven Michalski, Lanping Yue, Roger D. Kirby, Sy Hwang Liou

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

We report on the use of direct laser interference patterning to form an "anisotropy" lattice in CoPt thin film multilayers. CoPt multilayers have been extensively studied and, for the compositions studied here, are characterized by strong perpendicular magnetic anisotropy in which the magnetic moment is perpendicular to the film plane. In direct laser interference patterning, two-to-four coherent laser beams from a pulsed Nd:YAG laser strike the sample surface simultaneously, and for sufficiently intense beams the sample properties are modified locally where interference maxima occur. Kerr rotation, magnetic force microscopy, and atomic force microscopy measurements after patterning by one pulse from the laser show that the films have a regular array of "dots" with in-plane magnetization in a background matrix of perpendicular magnetization. Such patterning holds promise for the study of model nanoscale magnetic systems.

Original language	English (US)
Article number	093901
Journal	Journal of Applied Physics
Volume	99
Issue number	9
DOIs	https://doi.org/10.1063/1.2191747
State	Published - May 1 2006
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Formation of an anisotropy lattice in Co/Pt multilayers by direct laser interference patterning",

abstract = "We report on the use of direct laser interference patterning to form an {"}anisotropy{"} lattice in CoPt thin film multilayers. CoPt multilayers have been extensively studied and, for the compositions studied here, are characterized by strong perpendicular magnetic anisotropy in which the magnetic moment is perpendicular to the film plane. In direct laser interference patterning, two-to-four coherent laser beams from a pulsed Nd:YAG laser strike the sample surface simultaneously, and for sufficiently intense beams the sample properties are modified locally where interference maxima occur. Kerr rotation, magnetic force microscopy, and atomic force microscopy measurements after patterning by one pulse from the laser show that the films have a regular array of {"}dots{"} with in-plane magnetization in a background matrix of perpendicular magnetization. Such patterning holds promise for the study of model nanoscale magnetic systems.",

author = "Aliekber Aktag and Steven Michalski and Lanping Yue and Kirby, {Roger D.} and Liou, {Sy Hwang}",

note = "Funding Information: This research was supported by NSF-MRSEC, by the Center for Materials Research and Analysis, and by the Nebraska Research Initiative. We would like to thank Steve Ducharme for loan of experimental apparatus and for a number of helpful discussions, and Yi Liu for electron microscopy measurements.",

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doi = "10.1063/1.2191747",

language = "English (US)",

volume = "99",

journal = "Journal of Applied Physics",

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T1 - Formation of an anisotropy lattice in Co/Pt multilayers by direct laser interference patterning

AU - Aktag, Aliekber

AU - Michalski, Steven

AU - Yue, Lanping

AU - Kirby, Roger D.

AU - Liou, Sy Hwang

N1 - Funding Information: This research was supported by NSF-MRSEC, by the Center for Materials Research and Analysis, and by the Nebraska Research Initiative. We would like to thank Steve Ducharme for loan of experimental apparatus and for a number of helpful discussions, and Yi Liu for electron microscopy measurements.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - We report on the use of direct laser interference patterning to form an "anisotropy" lattice in CoPt thin film multilayers. CoPt multilayers have been extensively studied and, for the compositions studied here, are characterized by strong perpendicular magnetic anisotropy in which the magnetic moment is perpendicular to the film plane. In direct laser interference patterning, two-to-four coherent laser beams from a pulsed Nd:YAG laser strike the sample surface simultaneously, and for sufficiently intense beams the sample properties are modified locally where interference maxima occur. Kerr rotation, magnetic force microscopy, and atomic force microscopy measurements after patterning by one pulse from the laser show that the films have a regular array of "dots" with in-plane magnetization in a background matrix of perpendicular magnetization. Such patterning holds promise for the study of model nanoscale magnetic systems.

AB - We report on the use of direct laser interference patterning to form an "anisotropy" lattice in CoPt thin film multilayers. CoPt multilayers have been extensively studied and, for the compositions studied here, are characterized by strong perpendicular magnetic anisotropy in which the magnetic moment is perpendicular to the film plane. In direct laser interference patterning, two-to-four coherent laser beams from a pulsed Nd:YAG laser strike the sample surface simultaneously, and for sufficiently intense beams the sample properties are modified locally where interference maxima occur. Kerr rotation, magnetic force microscopy, and atomic force microscopy measurements after patterning by one pulse from the laser show that the films have a regular array of "dots" with in-plane magnetization in a background matrix of perpendicular magnetization. Such patterning holds promise for the study of model nanoscale magnetic systems.

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JF - Journal of Applied Physics

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ER -

Formation of an anisotropy lattice in Co/Pt multilayers by direct laser interference patterning

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