Magnetic anisotropy of Gd(0001)/W(110) monolayers

Journal Article · Wed Mar 01 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.4838· OSTI ID:6420986

Farle, M; Berghaus, A; Baberschke, K

The uniaxial magnetic anisotropy of Gd(0001) monolayers and of an 80-A epitaxial film on W(110) is determined near T/sub c/. Our magnetic resonance technique determines the effective magnetization in absolute magnetic-field units and is sensitive to the crystalline anisotropy below and above the Curie temperature. We find a temperature-dependent uniaxial anisotropy in the monolayer which favors alignment of the magnetization normal to the surface and is up to ten times larger than the bulk anisotropy. The dipolar shape anisotropy, however, dominates and the magnetization lies in the basal plane, i.e., the film plane. Furthermore, we demonstrate that the shape anisotropy of a monolayer depends on the lattice type. Summations of the dipolar fields on a square (bcc (100)) and a hexagonal lattice yield a 31% and 6% reduction of the shape anisotropy, respectively, when compared with the calculation for a homogeneous thin film with demagnetization one factor N/sub perpendicular/ = 1.

• Research Organization: Institut fuer Atom- und Festkoerperphysik, Freie Universitaet Berlin, D-1000 Berlin 33, Federal Republic of Germany
• OSTI ID: 6420986
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ANISOTROPY
ELEMENTS
EPITAXY
FILMS
GADOLINIUM
LAYERS
MAGNETIZATION
METALS
RARE EARTHS
TEMPERATURE DEPENDENCE
THIN FILMS
TRANSITION ELEMENTS
TUNGSTEN