Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Impact of Interfacial Magnetism on Magnetocaloric Properties of Thin Film Heterostructures

Published

Author(s)

Brian J. Kirby, June W. Lau, D. V. Williams, C. A. Bauer, Casey W. Miller

Abstract

Polarized neutron reflectometry was used to determine the depth profile of the magnetic moment per Gd atom, MGd, in a Gd(30 nm)/W(5 nm) multilayer. Despite sharp interfaces observed by Transmission Electron Microscopy, mGd is systematically suppressed near the Gd-W interfaces. Because the peak magnetic entropy change is proportional to M{2/3}Gd, this results in a reduction of the maximum achievable magnetocaloric effect in Gd-W heterostructures. By extension, our results suggest that creating materials with Gd-ferromagnet interfaces may increase the MGd relative to the bulk, leading to enhanced magnetocaloric properties.
Citation
Applied Physics Letters
Volume
109
Issue
6

Keywords

magnetocalorics, polarized neutron scattering

Citation

Kirby, B. , Lau, J. , , D. , , C. and , C. (2011), Impact of Interfacial Magnetism on Magnetocaloric Properties of Thin Film Heterostructures, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906642 (Accessed February 21, 2024)
Created March 17, 2011, Updated February 19, 2017