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approvedosi11_mcgilp.pdf2015-03-27 08:35:01John McGilp

Abstracts

Author: John F McGilp
Requested Type: Poster
Submitted: 2015-03-13 06:21:56

Co-authors: M. J. Duignan, J. P. Cunniffe, M. Liberati, P-A. Glans-Suzuki, E. Arenholz, C. McGuinness

Contact Info:
Trinity College Dublin
School of Physics
Dublin,   2
Ireland

Abstract Text:
Aligned Co nanowires, from 1, 2, 3 to 6 atoms wide, were grown on Pt(997) under UHV conditions and capped with 5, 6 or 9 ML of Au. It has been shown previously that capping with Au raises the Curie temperature and favours perpendicular magnetization of Co nanowires grown on Pt, both of which are of technological significance [1]. XMCD measurements were made at the L2,3 edge of Co as a function of temperature. Hysteresis loops were measured and coercivities extracted. The easy axis of magnetization was confirmed to be perpendicular to the (111) terrace for all samples. The temperature dependence of the coercivity is compared to the predictions of theoretical models.
[1] J. P. Cunniffe, D. E. McNally, M. Liberati, E. Arenholz, C. McGuinness and J. F. McGilp, "X-ray magnetic circular dichroism and reflection anisotropy spectroscopy Kerr effect studies of capped magnetic nanowires", physica status solidi (b) 247, 2108-12 (2010).

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