Magnetic properties of thin films of Co and of (CoPt) superstructures on Pt(100) and Pt(111)

U. Pustogowa, J. Zabloudil, C. Uiberacker, C. Blaas, P. Weinberger, L. Szunyogh, C. Sommers

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Abstract

The magnetic properties of Con/Pt(100), Con/Pt(111), (Co0.5Pt0.5)n/Pt(100), (CoPt)n/Pt(100), and (CoPt)n/Pt(111), n≤15, are investigated using the relativistic spin-polarized screened Korringa-Kohn-Rostoker method. It is found that only the artificial superstructures (CoPt)n/Pt(100) and (CoPt)n/Pt(111) show a perpendicular magnetic anisotropy beyond n=10. For the free surfaces of Co on Pt in the case of the (100) orientation, a multiple reorientation transition below n=7 is found, while along (111) such a transition is predicted at about four layers of Co. For the homogeneous, statistically disordered alloy Co0.5Pt0.5 on Pt(100) the orientation of the magnetization remains in-plane for all n investigated. A comparison to experiment yields interesting insight into aspects of order and disorder, surface segregation, and phase separation frequently encountered in experimental studies of perpendicular magnetism in the Co/Pt system.

Original languageEnglish
Pages (from-to)414-421
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number1
Publication statusPublished - 1999

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Surface segregation
Magnetic anisotropy
Magnetism
Phase separation
Magnetization
Magnetic properties
magnetic properties
Thin films
thin films
retraining
Experiments
disorders
magnetization
anisotropy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Pustogowa, U., Zabloudil, J., Uiberacker, C., Blaas, C., Weinberger, P., Szunyogh, L., & Sommers, C. (1999). Magnetic properties of thin films of Co and of (CoPt) superstructures on Pt(100) and Pt(111). Physical Review B - Condensed Matter and Materials Physics, 60(1), 414-421.

Magnetic properties of thin films of Co and of (CoPt) superstructures on Pt(100) and Pt(111). / Pustogowa, U.; Zabloudil, J.; Uiberacker, C.; Blaas, C.; Weinberger, P.; Szunyogh, L.; Sommers, C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 60, No. 1, 1999, p. 414-421.

Research output: Contribution to journalArticle

Pustogowa, U, Zabloudil, J, Uiberacker, C, Blaas, C, Weinberger, P, Szunyogh, L & Sommers, C 1999, 'Magnetic properties of thin films of Co and of (CoPt) superstructures on Pt(100) and Pt(111)', Physical Review B - Condensed Matter and Materials Physics, vol. 60, no. 1, pp. 414-421.
Pustogowa, U. ; Zabloudil, J. ; Uiberacker, C. ; Blaas, C. ; Weinberger, P. ; Szunyogh, L. ; Sommers, C. / Magnetic properties of thin films of Co and of (CoPt) superstructures on Pt(100) and Pt(111). In: Physical Review B - Condensed Matter and Materials Physics. 1999 ; Vol. 60, No. 1. pp. 414-421.
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AU - Pustogowa, U.

AU - Zabloudil, J.

AU - Uiberacker, C.

AU - Blaas, C.

AU - Weinberger, P.

AU - Szunyogh, L.

AU - Sommers, C.

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AB - The magnetic properties of Con/Pt(100), Con/Pt(111), (Co0.5Pt0.5)n/Pt(100), (CoPt)n/Pt(100), and (CoPt)n/Pt(111), n≤15, are investigated using the relativistic spin-polarized screened Korringa-Kohn-Rostoker method. It is found that only the artificial superstructures (CoPt)n/Pt(100) and (CoPt)n/Pt(111) show a perpendicular magnetic anisotropy beyond n=10. For the free surfaces of Co on Pt in the case of the (100) orientation, a multiple reorientation transition below n=7 is found, while along (111) such a transition is predicted at about four layers of Co. For the homogeneous, statistically disordered alloy Co0.5Pt0.5 on Pt(100) the orientation of the magnetization remains in-plane for all n investigated. A comparison to experiment yields interesting insight into aspects of order and disorder, surface segregation, and phase separation frequently encountered in experimental studies of perpendicular magnetism in the Co/Pt system.

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