Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 322, Issue 17, Pages 2618-2621Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2010.03.030
Keywords
Ferromagnetic palladium; Thickness dependent coercivity; Thickness dependent Curie temperature
Funding
- NSF [DMR-0704240, DMR-0403480]
Ask authors/readers for more resources
The magnetic properties of thin-film Pd/Fe/Pd trilayers in which an embedded similar to 1.5 angstrom-thick ultrathin layer of Fe induces ferromagnetism in the surrounding Pd have been investigated. The thickness of the ferromagnetic trilayer is controlled by varying the thickness of the top Pd layer over a range from 8 to 56 angstrom. As the thickness of the top Pd layer decreases, or equivalently as the embedded Fe layer moves closer to the top surface, the saturated magnetization normalized to area and the Curie temperature decreases, where as the coercivity increases. These thickness-dependent observations for proximity polarized thin-film Pd are qualitatively consistent with finite size effects that are well known for regular thin-film ferromagnets. The critical exponent beta of the order parameter (magnetization) is found to approach the mean field value of 0.5 as the thickness of the top Pd layer increases. The functional forms for the thickness dependences, which are strongly modified by the nonuniform exchange interaction in the polarized Pd, provide important new insights to understand nanomagnetism in two-dimensions. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available