Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements

C. König; M. Sperlich; R. Calarco; J. O. Hauch; U. Rüdiger; G. Güntherodt; S. Kirsch; B. Özyilmaz; A. D. Kent

doi:10.1109/INTMAG.2002.1001211

Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements

C. König, M. Sperlich, R. Calarco, J. O. Hauch, U. Rüdiger, G. Güntherodt, S. Kirsch, B. Özyilmaz, A. D. Kent

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The magnetization reversal processes and magnetic domain states of microstructured epitaxial Fe[110] elements have been investigated by magnetic force microscopy and longitudinal Kerr hysteresis loop measurements. For this purpose 25 nm thick epitaxial Fe[110] films were grown on (11-20) oriented Al₂O₃ substrates using molecular beam epitaxy techniques in ultra high vacuum. These films have been patterned into arrays of well defined magnetic elements with lateral dimensions of 1.5 μmx0.5 μm by electron beam lithography followed by argon ion milling. Two different particle shapes have been realized: rectangular and diamond- shaped elements. By aligning the long axis of the particles parallel to the easy magnetic axis of the Fe[110] films, i.e. the in-plane Fe[001] direction, the interplay of shape, magnetocrystalline, as well as the strain-induced uniaxial anisotropy favors a single domain state. It has been shown that the characteristic micromagnetic behavior such as coercive and nucleation fields can be tailored by taking advantage of the pronounced uniaxial anisotropy and by varying the shape of the elements. Independent of the shape of the elements the remanent state after magnetic saturation along the long axis of the elements is a single domain state. In contrast, after magnetic saturation perpendicular to the long axis various multi-domain states have been observed. The determined flux closure domain states are in good agreement with micromagnetic simulations.

Original language	English (US)
Title of host publication	INTERMAG Europe 2002 - IEEE International Magnetics Conference
Editors	J. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, Jo De Boeck, R. Wood
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	0780373650, 9780780373655
DOIs	https://doi.org/10.1109/INTMAG.2002.1001211
State	Published - 2002
Event	2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands Duration: Apr 28 2002 → May 2 2002

Publication series

Name	INTERMAG Europe 2002 - IEEE International Magnetics Conference

Other

Other	2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
Country/Territory	Netherlands
City	Amsterdam
Period	4/28/02 → 5/2/02

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering
Surfaces, Coatings and Films

Access to Document

10.1109/INTMAG.2002.1001211

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König, C., Sperlich, M., Calarco, R., Hauch, J. O., Rüdiger, U., Güntherodt, G., Kirsch, S., Özyilmaz, B., & Kent, A. D. (2002). Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements. In J. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, J. De Boeck, & R. Wood (Eds.), INTERMAG Europe 2002 - IEEE International Magnetics Conference Article 1001211 (INTERMAG Europe 2002 - IEEE International Magnetics Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTMAG.2002.1001211

Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements. / König, C.; Sperlich, M.; Calarco, R. et al.
INTERMAG Europe 2002 - IEEE International Magnetics Conference. ed. / J. Fidler; B. Hillebrands; C. Ross; D. Weller; L. Folks; E. Hill; M. Vazquez Villalabeitia; J. A. Bain; Jo De Boeck; R. Wood. Institute of Electrical and Electronics Engineers Inc., 2002. 1001211 (INTERMAG Europe 2002 - IEEE International Magnetics Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

König, C, Sperlich, M, Calarco, R, Hauch, JO, Rüdiger, U, Güntherodt, G, Kirsch, S, Özyilmaz, B & Kent, AD 2002, Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements. in J Fidler, B Hillebrands, C Ross, D Weller, L Folks, E Hill, M Vazquez Villalabeitia, JA Bain, J De Boeck & R Wood (eds), INTERMAG Europe 2002 - IEEE International Magnetics Conference., 1001211, INTERMAG Europe 2002 - IEEE International Magnetics Conference, Institute of Electrical and Electronics Engineers Inc., 2002 IEEE International Magnetics Conference, INTERMAG Europe 2002, Amsterdam, Netherlands, 4/28/02. https://doi.org/10.1109/INTMAG.2002.1001211

König C, Sperlich M, Calarco R, Hauch JO, Rüdiger U, Güntherodt G et al. Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements. In Fidler J, Hillebrands B, Ross C, Weller D, Folks L, Hill E, Vazquez Villalabeitia M, Bain JA, De Boeck J, Wood R, editors, INTERMAG Europe 2002 - IEEE International Magnetics Conference. Institute of Electrical and Electronics Engineers Inc. 2002. 1001211. (INTERMAG Europe 2002 - IEEE International Magnetics Conference). doi: 10.1109/INTMAG.2002.1001211

König, C. ; Sperlich, M. ; Calarco, R. et al. / Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements. INTERMAG Europe 2002 - IEEE International Magnetics Conference. editor / J. Fidler ; B. Hillebrands ; C. Ross ; D. Weller ; L. Folks ; E. Hill ; M. Vazquez Villalabeitia ; J. A. Bain ; Jo De Boeck ; R. Wood. Institute of Electrical and Electronics Engineers Inc., 2002. (INTERMAG Europe 2002 - IEEE International Magnetics Conference).

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abstract = "The magnetization reversal processes and magnetic domain states of microstructured epitaxial Fe[110] elements have been investigated by magnetic force microscopy and longitudinal Kerr hysteresis loop measurements. For this purpose 25 nm thick epitaxial Fe[110] films were grown on (11-20) oriented Al2O3 substrates using molecular beam epitaxy techniques in ultra high vacuum. These films have been patterned into arrays of well defined magnetic elements with lateral dimensions of 1.5 μmx0.5 μm by electron beam lithography followed by argon ion milling. Two different particle shapes have been realized: rectangular and diamond- shaped elements. By aligning the long axis of the particles parallel to the easy magnetic axis of the Fe[110] films, i.e. the in-plane Fe[001] direction, the interplay of shape, magnetocrystalline, as well as the strain-induced uniaxial anisotropy favors a single domain state. It has been shown that the characteristic micromagnetic behavior such as coercive and nucleation fields can be tailored by taking advantage of the pronounced uniaxial anisotropy and by varying the shape of the elements. Independent of the shape of the elements the remanent state after magnetic saturation along the long axis of the elements is a single domain state. In contrast, after magnetic saturation perpendicular to the long axis various multi-domain states have been observed. The determined flux closure domain states are in good agreement with micromagnetic simulations.",

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AB - The magnetization reversal processes and magnetic domain states of microstructured epitaxial Fe[110] elements have been investigated by magnetic force microscopy and longitudinal Kerr hysteresis loop measurements. For this purpose 25 nm thick epitaxial Fe[110] films were grown on (11-20) oriented Al2O3 substrates using molecular beam epitaxy techniques in ultra high vacuum. These films have been patterned into arrays of well defined magnetic elements with lateral dimensions of 1.5 μmx0.5 μm by electron beam lithography followed by argon ion milling. Two different particle shapes have been realized: rectangular and diamond- shaped elements. By aligning the long axis of the particles parallel to the easy magnetic axis of the Fe[110] films, i.e. the in-plane Fe[001] direction, the interplay of shape, magnetocrystalline, as well as the strain-induced uniaxial anisotropy favors a single domain state. It has been shown that the characteristic micromagnetic behavior such as coercive and nucleation fields can be tailored by taking advantage of the pronounced uniaxial anisotropy and by varying the shape of the elements. Independent of the shape of the elements the remanent state after magnetic saturation along the long axis of the elements is a single domain state. In contrast, after magnetic saturation perpendicular to the long axis various multi-domain states have been observed. The determined flux closure domain states are in good agreement with micromagnetic simulations.

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ER -

Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements

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