Canted magnetic moments at the Gd(0001) surface

Conference · Fri Jan 01 04:00:00 EST 1993

OSTI ID:6543693

Li, Dongqi; Zhang, Jiandi; 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 (United States)
2. Brookhaven National Lab., NY (United States)
3. Univ. of California, Irvine (United States)
4. IBM Almaden Research Center, San Jose, CA (United States)

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: DOE; NSF; USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6543693
• Report Number(s): BNL-48954; CONF-930405--14; ON: DE93014327
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
665000 -- Physics of Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONTAMINATION
COUPLING
CURIE POINT
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
FERROMAGNETISM
FILMS
GADOLINIUM
MAGNETIC MOMENTS
MAGNETISM
METALS
ORIENTATION
PHOTOEMISSION
PHYSICAL PROPERTIES
RARE EARTHS
SECONDARY EMISSION
SPECTROSCOPY
SPIN ORIENTATION
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
TUNGSTEN