Magnetic properties of fe microstructures with focused ion beam-fabricated nano-constrictions

Igor V. Roshchin; Jun Yu; Andrew D. Kent; Gary W. Stupian; Martin S. Leung

doi:10.1109/20.951066

Magnetic properties of fe microstructures with focused ion beam-fabricated nano-constrictions

Igor V. Roshchin, Jun Yu, Andrew D. Kent, Gary W. Stupian, Martin S. Leung

Research output: Contribution to journal › Conference article › peer-review

Abstract

Studies of the magnetic properties of Fe microfabricated wires with a mechanically stable 40 to 120 nm-wide constriction produced with focused ion beam are reported. The 2 to 20 μm-wide wires are fabricated by photolithography from 3 nm and 25 nm-thick epitaxial (110) bcc Fe films. This fabrication method appears to preserve the magnetic properties of the constriction. The structures are studied by MFM and by magneto-optic Kerr effect (MOKE) measurements. The ratio of the wire linewidth to its thickness determines the demagnetization factor and, therefore, influences the coercivity of the wire. Both a step in the width of the wire and a nano-constriction in the middle of the wire are found to be domain wall (DW) pinning centers.

Original language	English (US)
Pages (from-to)	2101-2103
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.951066
State	Published - Jul 2001
Event	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: Jan 7 2001 → Jan 11 2001

Keywords

FIB
Fe
Ferromagnetic microstructures
Iron epitaxial thin films
Kerr effect
MFM
Magnetization reversal
Nano-structures

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/20.951066

Cite this

@article{bce48eb3bdb44b3dbf8467200d8fb1e1,

title = "Magnetic properties of fe microstructures with focused ion beam-fabricated nano-constrictions",

abstract = "Studies of the magnetic properties of Fe microfabricated wires with a mechanically stable 40 to 120 nm-wide constriction produced with focused ion beam are reported. The 2 to 20 μm-wide wires are fabricated by photolithography from 3 nm and 25 nm-thick epitaxial (110) bcc Fe films. This fabrication method appears to preserve the magnetic properties of the constriction. The structures are studied by MFM and by magneto-optic Kerr effect (MOKE) measurements. The ratio of the wire linewidth to its thickness determines the demagnetization factor and, therefore, influences the coercivity of the wire. Both a step in the width of the wire and a nano-constriction in the middle of the wire are found to be domain wall (DW) pinning centers.",

keywords = "FIB, Fe, Ferromagnetic microstructures, Iron epitaxial thin films, Kerr effect, MFM, Magnetization reversal, Nano-structures",

author = "Roshchin, {Igor V.} and Jun Yu and Kent, {Andrew D.} and Stupian, {Gary W.} and Leung, {Martin S.}",

note = "Funding Information: Manuscript received October 13, 2000. I. V. Roshchin, J. Yu, and A. D. Kent were supported by DARPA-ONR, Grant N00014-96-1-1207. G. W. Stupian and M. S. Leung were supported by the United States Air Force under Contract F04701-00-C-0009. I. V. Roshchin and A. D. Kent are with the Department of Physics, New York University, New York, NY 10003 USA (e-mail: {ivr1; andy.kent}@nyu.edu). J. Yu was with the Department of Physics, New York University. He is now with Advanced Materials Research Institute, University of New Orleans, Sea-gate Research, Pittsburgh, PA 15203 USA. G. W. Stupian and M. S. Leung are with the Electronics and Photonics Laboratory, Laboratory Operations, The Aerospace Corporation, El Segundo, CA 90245. Publisher Item Identifier S 0018-9464(01)07259-4.; 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) ; Conference date: 07-01-2001 Through 11-01-2001",

year = "2001",

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volume = "37",

pages = "2101--2103",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

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T1 - Magnetic properties of fe microstructures with focused ion beam-fabricated nano-constrictions

AU - Roshchin, Igor V.

AU - Yu, Jun

AU - Kent, Andrew D.

AU - Stupian, Gary W.

AU - Leung, Martin S.

N1 - Funding Information: Manuscript received October 13, 2000. I. V. Roshchin, J. Yu, and A. D. Kent were supported by DARPA-ONR, Grant N00014-96-1-1207. G. W. Stupian and M. S. Leung were supported by the United States Air Force under Contract F04701-00-C-0009. I. V. Roshchin and A. D. Kent are with the Department of Physics, New York University, New York, NY 10003 USA (e-mail: {ivr1; andy.kent}@nyu.edu). J. Yu was with the Department of Physics, New York University. He is now with Advanced Materials Research Institute, University of New Orleans, Sea-gate Research, Pittsburgh, PA 15203 USA. G. W. Stupian and M. S. Leung are with the Electronics and Photonics Laboratory, Laboratory Operations, The Aerospace Corporation, El Segundo, CA 90245. Publisher Item Identifier S 0018-9464(01)07259-4.

PY - 2001/7

Y1 - 2001/7

N2 - Studies of the magnetic properties of Fe microfabricated wires with a mechanically stable 40 to 120 nm-wide constriction produced with focused ion beam are reported. The 2 to 20 μm-wide wires are fabricated by photolithography from 3 nm and 25 nm-thick epitaxial (110) bcc Fe films. This fabrication method appears to preserve the magnetic properties of the constriction. The structures are studied by MFM and by magneto-optic Kerr effect (MOKE) measurements. The ratio of the wire linewidth to its thickness determines the demagnetization factor and, therefore, influences the coercivity of the wire. Both a step in the width of the wire and a nano-constriction in the middle of the wire are found to be domain wall (DW) pinning centers.

AB - Studies of the magnetic properties of Fe microfabricated wires with a mechanically stable 40 to 120 nm-wide constriction produced with focused ion beam are reported. The 2 to 20 μm-wide wires are fabricated by photolithography from 3 nm and 25 nm-thick epitaxial (110) bcc Fe films. This fabrication method appears to preserve the magnetic properties of the constriction. The structures are studied by MFM and by magneto-optic Kerr effect (MOKE) measurements. The ratio of the wire linewidth to its thickness determines the demagnetization factor and, therefore, influences the coercivity of the wire. Both a step in the width of the wire and a nano-constriction in the middle of the wire are found to be domain wall (DW) pinning centers.

KW - FIB

KW - Fe

KW - Ferromagnetic microstructures

KW - Iron epitaxial thin films

KW - Kerr effect

KW - MFM

KW - Magnetization reversal

KW - Nano-structures

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SP - 2101

EP - 2103

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 4 I

T2 - 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag)

Y2 - 7 January 2001 through 11 January 2001

ER -

Magnetic properties of fe microstructures with focused ion beam-fabricated nano-constrictions

Abstract

Keywords

ASJC Scopus subject areas

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