Journal Article

PreJuSER-58962

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Two-Dimensional Surface Magnetism in the Bulk Paramagnetic Intermetallic Alloy CoAl(100)

Rose, V. ; Brüggemann, K.FZJ* ; David, R.FZJ* ; Franchy, R.FZJ*

2007
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/7744  doi:10.1103/PhysRevLett.98.037202

Abstract: Utilizing a combination of the in situ magneto-optical Kerr effect and scanning tunneling microscopy and spectroscopy measurements, we show that the (100) surface of the B2 bulk paramagnetic CoAl is an excellent representation of a two-dimensional ferromagnet. The order-parameter critical exponent beta=0.22 +/- 0.02 is determined, which is the universal signature of a finite-size two-dimensional XY behavior. The Curie temperature is found to be T-c=90 K. The magnetism can be explained by the appearance of Co antisite atoms at the surface.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2007

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