Magnetic Modulation In Ferrimagnetic Fe<sub>1-X</sub>Gd<sub>x </sub>Thin Film Multilayer Structures By Variation of Compensation Temperature
ORAL
Abstract
Metallic ferrimagnets consisting of rare earth (RE) / transition metal (TM) alloys exhibit an intriguing magnetic compensation of the RE/TM magnetic sublattices as a function of composition and temperature. We have been examining Fe1-xGdx thin films where the Gd content has been modified systematically. Static magneto-optic Kerr effect measurements of monolithic films are used to determine the composition that has magnetic compensation at room temperature. The compensation temperatures of the samples are then verified with temperature dependent magnetometry. Magnetic bi-layers and multilayers with dissimilar Fe1-xGdx ratios are also explored; for example, ~26% Gd (compensation at 140K) and ~25% Gd (compensation at 280K) bi-layers exhibit non-trivial magnetization vs. temperature behavior. These films are structurally nearly homogeneous while the magnetic profile differs dramatically with temperature variations. The magnetic interface of such structures is undetermined and we will use polarized neutron reflectometry (PNR) to examine spin ordering in the interfacial region as a function of field and temperature.
–
Presenters
-
Jenae Shoup
University of South Florida, University of South Florida, Tampa, FL
Authors
-
Jenae Shoup
University of South Florida, University of South Florida, Tampa, FL
-
Brian Kirby
National Institute of Standards and Technology, National Institute of Standards and Technology, Gaithersburg, MD, Center for Neutron Research, National Institute of Standards and Technology
-
Dario Arena
University of South Florida, University of South Florida, Tampa, FL, Physics, University of South Florida