Temperature dependent chemical ordering in FePt(001) and FePt(110) films

M. M. Schwickert, K. A. Hannibal, M. F. Toney, M. Best, L. Folks, J. U. Thiele, A. J. Kellock, D. Weller

Research output: Contribution to journalConference articlepeer-review

24 Scopus citations


The growth temperature is one of the critical parameters in the formation of the chemically ordered L10 phase in FePt. To uniquely determine the influence of growth temperature, while other growth parameters remain fixed, we present the "temperature wedge method" where a calibrated temperature gradient of several hundred Kelvin is established across the substrate during co-deposition of Fe and Pt. Samples were deposited in a temperature range of 250°C-600°C simultaneously on MgO(001) and MgO(110) substrates. The Fe≈50Pt≈50 composition was verified by Rutherford backscattering. The chemical order parameter, S, at different positions along the samples, i.e., at different growth temperatures, was determined by x-ray diffraction measurements, and it was found that at all temperatures S(001) > S(110). Perpendicular and in-plane magneto-optic Kerr hysteresis loop measurements indicate large magnetic anisotropy at the "hot ends" of the samples, corresponding to large values of S.

Original languageEnglish (US)
Pages (from-to)6956-6958
Number of pages3
JournalJournal of Applied Physics
Issue number9 III
StatePublished - May 1 2000
Event44th Annual Conference on Magnetism and Magnetic Materials - San Jose, CA, United States
Duration: Nov 15 1999Nov 18 1999

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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