Finite size effects in patterned magnetic permalloy films

G. Gubbiotti, L. Albini, G. Carlotti, M. De Crescenzi, E. Di Fabrizio, A. Gerardino, O. Donzelli, F. Nizzoli, Hyun Cheol Koo, R. D. Gomez

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Electron beam lithography has been used to prepare 250-Å-thick square-shaped permalloy dots whose width and separation are in the range between 1 and 4 μm. The static and dynamic magnetic properties of these structures have been investigated by complementary techniques such as magneto-optic Kerr effect (MOKE), magnetic force microscopy (MFM), and Brillouin light scattering (BLS). Longitudinal MOKE enabled us to compare the hysteresis loops of the specimens with different dot size and interdot separation, showing a marked influence of the demagnetizing field inside the dots. MFM images recorded at zero applied field showed that, depending on the interdot spacing, there is a prevalence of either four- or seven-domain patterns together with a minority of nonsolenoidal patterns that possess a net magnetic moment. BLS from thermally activated spin waves were then used to determine the intrinsic magnetic parameters of the permalloy films and to show evidence of the discretization of the spin-wave peak due to the wave vector resonance condition within each dot.

Original languageEnglish
Pages (from-to)5633-5635
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number9 II
Publication statusPublished - 2000 May
Externally publishedYes

Fingerprint

magnetic force microscopy
magneto-optics
Permalloys (trademark)
Kerr effects
magnons
light scattering
size separation
minorities
lithography
magnetic moments
hysteresis
spacing
electron beams
magnetic properties

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Gubbiotti, G., Albini, L., Carlotti, G., De Crescenzi, M., Di Fabrizio, E., Gerardino, A., ... Gomez, R. D. (2000). Finite size effects in patterned magnetic permalloy films. Journal of Applied Physics, 87(9 II), 5633-5635.

Finite size effects in patterned magnetic permalloy films. / Gubbiotti, G.; Albini, L.; Carlotti, G.; De Crescenzi, M.; Di Fabrizio, E.; Gerardino, A.; Donzelli, O.; Nizzoli, F.; Koo, Hyun Cheol; Gomez, R. D.

In: Journal of Applied Physics, Vol. 87, No. 9 II, 05.2000, p. 5633-5635.

Research output: Contribution to journalArticle

Gubbiotti, G, Albini, L, Carlotti, G, De Crescenzi, M, Di Fabrizio, E, Gerardino, A, Donzelli, O, Nizzoli, F, Koo, HC & Gomez, RD 2000, 'Finite size effects in patterned magnetic permalloy films', Journal of Applied Physics, vol. 87, no. 9 II, pp. 5633-5635.
Gubbiotti G, Albini L, Carlotti G, De Crescenzi M, Di Fabrizio E, Gerardino A et al. Finite size effects in patterned magnetic permalloy films. Journal of Applied Physics. 2000 May;87(9 II):5633-5635.
Gubbiotti, G. ; Albini, L. ; Carlotti, G. ; De Crescenzi, M. ; Di Fabrizio, E. ; Gerardino, A. ; Donzelli, O. ; Nizzoli, F. ; Koo, Hyun Cheol ; Gomez, R. D. / Finite size effects in patterned magnetic permalloy films. In: Journal of Applied Physics. 2000 ; Vol. 87, No. 9 II. pp. 5633-5635.
@article{f93a429dccf34fcd88f4ff2954adc3d9,
title = "Finite size effects in patterned magnetic permalloy films",
abstract = "Electron beam lithography has been used to prepare 250-{\AA}-thick square-shaped permalloy dots whose width and separation are in the range between 1 and 4 μm. The static and dynamic magnetic properties of these structures have been investigated by complementary techniques such as magneto-optic Kerr effect (MOKE), magnetic force microscopy (MFM), and Brillouin light scattering (BLS). Longitudinal MOKE enabled us to compare the hysteresis loops of the specimens with different dot size and interdot separation, showing a marked influence of the demagnetizing field inside the dots. MFM images recorded at zero applied field showed that, depending on the interdot spacing, there is a prevalence of either four- or seven-domain patterns together with a minority of nonsolenoidal patterns that possess a net magnetic moment. BLS from thermally activated spin waves were then used to determine the intrinsic magnetic parameters of the permalloy films and to show evidence of the discretization of the spin-wave peak due to the wave vector resonance condition within each dot.",
author = "G. Gubbiotti and L. Albini and G. Carlotti and {De Crescenzi}, M. and {Di Fabrizio}, E. and A. Gerardino and O. Donzelli and F. Nizzoli and Koo, {Hyun Cheol} and Gomez, {R. D.}",
year = "2000",
month = "5",
language = "English",
volume = "87",
pages = "5633--5635",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "9 II",

}

TY - JOUR

T1 - Finite size effects in patterned magnetic permalloy films

AU - Gubbiotti, G.

AU - Albini, L.

AU - Carlotti, G.

AU - De Crescenzi, M.

AU - Di Fabrizio, E.

AU - Gerardino, A.

AU - Donzelli, O.

AU - Nizzoli, F.

AU - Koo, Hyun Cheol

AU - Gomez, R. D.

PY - 2000/5

Y1 - 2000/5

N2 - Electron beam lithography has been used to prepare 250-Å-thick square-shaped permalloy dots whose width and separation are in the range between 1 and 4 μm. The static and dynamic magnetic properties of these structures have been investigated by complementary techniques such as magneto-optic Kerr effect (MOKE), magnetic force microscopy (MFM), and Brillouin light scattering (BLS). Longitudinal MOKE enabled us to compare the hysteresis loops of the specimens with different dot size and interdot separation, showing a marked influence of the demagnetizing field inside the dots. MFM images recorded at zero applied field showed that, depending on the interdot spacing, there is a prevalence of either four- or seven-domain patterns together with a minority of nonsolenoidal patterns that possess a net magnetic moment. BLS from thermally activated spin waves were then used to determine the intrinsic magnetic parameters of the permalloy films and to show evidence of the discretization of the spin-wave peak due to the wave vector resonance condition within each dot.

AB - Electron beam lithography has been used to prepare 250-Å-thick square-shaped permalloy dots whose width and separation are in the range between 1 and 4 μm. The static and dynamic magnetic properties of these structures have been investigated by complementary techniques such as magneto-optic Kerr effect (MOKE), magnetic force microscopy (MFM), and Brillouin light scattering (BLS). Longitudinal MOKE enabled us to compare the hysteresis loops of the specimens with different dot size and interdot separation, showing a marked influence of the demagnetizing field inside the dots. MFM images recorded at zero applied field showed that, depending on the interdot spacing, there is a prevalence of either four- or seven-domain patterns together with a minority of nonsolenoidal patterns that possess a net magnetic moment. BLS from thermally activated spin waves were then used to determine the intrinsic magnetic parameters of the permalloy films and to show evidence of the discretization of the spin-wave peak due to the wave vector resonance condition within each dot.

UR - http://www.scopus.com/inward/record.url?scp=0000882744&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000882744&partnerID=8YFLogxK

M3 - Article

VL - 87

SP - 5633

EP - 5635

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 9 II

ER -