%0 Journal Article
%A Rose, V.
%A Brüggemann, K.
%A David, R.
%A Franchy, R.
%T Two-Dimensional Surface Magnetism in the Bulk Paramagnetic Intermetallic Alloy CoAl(100)
%J Physical review letters
%V 98
%@ 0031-9007
%C College Park, Md.
%I APS
%M PreJuSER-58962
%P 037202
%D 2007
%Z Record converted from VDB: 12.11.2012
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000243587200059
%R 10.1103/PhysRevLett.98.037202
%U https://juser.fz-juelich.de/record/58962