TY  - JOUR
AU  - Rose, V.
AU  - Brüggemann, K.
AU  - David, R.
AU  - Franchy, R.
TI  - Two-Dimensional Surface Magnetism in the Bulk Paramagnetic Intermetallic Alloy CoAl(100)
JO  - Physical review letters
VL  - 98
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-58962
SP  - 037202
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000243587200059
DO  - DOI:10.1103/PhysRevLett.98.037202
UR  - https://juser.fz-juelich.de/record/58962
ER  -