Two-dimensional surface magnetism in the bulk paramagnetic intermetallic alloy CoAl(100).
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{sub c} = 90 K. The magnetism can be explained by the appearance of Co antisite atoms at the surface.
- Authors:
-
- (ISG-3).
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 943423
- Report Number(s):
- ANL/XSD/JA-57896
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US200902%%195
- DOE Contract Number:
- DE-AC02-06CH11357
- Resource Type:
- Journal Article
- Resource Relation:
- Journal Name: Phys. Rev. Lett.; Journal Volume: 98; Journal Issue: Jan. 17, 2007
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 01 COAL, LIGNITE, AND PEAT; ALLOYS; ATOMS; COAL; CURIE POINT; KERR EFFECT; MAGNETISM; SCANNING TUNNELING MICROSCOPY; SPECTROSCOPY
Citation Formats
Rose, V., Bruggemann, K., David, R., Franchy, R., Center for Nanoscale Materials, and Institute for Surfaces and Interfaces. Two-dimensional surface magnetism in the bulk paramagnetic intermetallic alloy CoAl(100).. United States: N. p., 2007.
Web. doi:10.1103/PhysRevLett.98.037202.
Rose, V., Bruggemann, K., David, R., Franchy, R., Center for Nanoscale Materials, & Institute for Surfaces and Interfaces. Two-dimensional surface magnetism in the bulk paramagnetic intermetallic alloy CoAl(100).. United States. doi:10.1103/PhysRevLett.98.037202.
Rose, V., Bruggemann, K., David, R., Franchy, R., Center for Nanoscale Materials, and Institute for Surfaces and Interfaces. Wed .
"Two-dimensional surface magnetism in the bulk paramagnetic intermetallic alloy CoAl(100).". United States.
doi:10.1103/PhysRevLett.98.037202.
@article{osti_943423,
title = {Two-dimensional surface magnetism in the bulk paramagnetic intermetallic alloy CoAl(100).},
author = {Rose, V. and Bruggemann, K. and David, R. and Franchy, R. and Center for Nanoscale Materials and Institute for Surfaces and Interfaces},
abstractNote = {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{sub c} = 90 K. The magnetism can be explained by the appearance of Co antisite atoms at the surface.},
doi = {10.1103/PhysRevLett.98.037202},
journal = {Phys. Rev. Lett.},
number = Jan. 17, 2007,
volume = 98,
place = {United States},
year = {Wed Jan 17 00:00:00 EST 2007},
month = {Wed Jan 17 00:00:00 EST 2007}
}
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