Canted magnetic moments at the Gd(0001) surface

Conference · Tue Jun 01 04:00:00 EDT 1993

OSTI ID:10161971

Donggi, Li; Jiandi, Zhang; Dowben, P A ^[1]; Garrison, K; Johnson, P D ^[2]; Tang, H; Walker, T G; Hopster, H ^[3]; Scott, J C; Weller, D; Pappas, D P ^[4]

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1. Syracuse Univ., NY (US). Dept. of Physics
2. Brookhaven National Lab., Upton, NY (US)
3. Univ. of California, Irvine (US). Dept. of Physics
4. IBM Almaden Research Center, San Jose, CA (US)

With spin polarized electron spectroscopies, the authors have investigated ordered Gd(0001) films deposited on W(110). The photoemission features of the gadolinium 5d surface state, the 4f levels, and the background exhibit considerable spin polarization along the same direction in the plane of the film, indicative of ferromagnetic coupling between the surface and the bulk. The 4f spin polarized photoemission data provides strong evidence that the surface 4f polarization differs from the bulk 4f polarization for Gd(0001). The temperature dependent measurements with spin polarized secondary electron spectroscopy conclusively establishes that the surface of clean Gd(0001) possesses a perpendicular polarization component which persists to an enhanced surface Curie temperature. Small amounts of contamination at the surface result in the disappearance of the perpendicular component and, therefore, a more perfect ferromagnetic coupling between the surface and the bulk.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 10161971
• Report Number(s): BNL--48954; CONF-930405--14; ON: DE93014327
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104
665000
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONTAMINATION
COUPLING
CURIE POINT
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
FERROMAGNETISM
GADOLINIUM
MAGNETIC MOMENTS
PHOTOEMISSION
PHYSICAL PROPERTIES
PHYSICS OF CONDENSED MATTER
SECONDARY EMISSION
SPIN ORIENTATION
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THIN FILMS
TUNGSTEN