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Title: Influence of surface segregation on magnetic properties of FePt nanoparticles

Abstract

Surface segregation leads to chemical disordering in magnetic alloy nanostructures and thus could have profound impact upon the magnetic properties of these nanostructures. In this study, we used the first-principles density functional theory calculation method to determine how Pt surface segregation (exchanging interior Pt with surface Fe atoms) would affect the magnetic properties of L1{sub 0} ordered FePt nanoparticles. For both cuboid and cuboctahedral FePt nanoparticles, we predicted that the Pt surface segregation process could cause a decrease in total magnetic moments, a change in (easy and/or hard) magnetization axes, and a reduction in magnetic anisotropy.

Authors:
 [1]; ; ;  [1]
  1. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261 (United States)
Publication Date:
OSTI Identifier:
22217970
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 103; Journal Issue: 13; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; ANISOTROPY; ATOMS; DENSITY FUNCTIONAL METHOD; IRON ALLOYS; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MAGNETIZATION; NANOSTRUCTURES; PLATINUM ALLOYS; REDUCTION; SEGREGATION; SURFACES

Citation Formats

Lv, Hongyan, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, Lei, Yinkai, Datta, Aditi, and Wang, Guofeng. Influence of surface segregation on magnetic properties of FePt nanoparticles. United States: N. p., 2013. Web. doi:10.1063/1.4822172.
Lv, Hongyan, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, Lei, Yinkai, Datta, Aditi, & Wang, Guofeng. Influence of surface segregation on magnetic properties of FePt nanoparticles. United States. https://doi.org/10.1063/1.4822172
Lv, Hongyan, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, Lei, Yinkai, Datta, Aditi, and Wang, Guofeng. 2013. "Influence of surface segregation on magnetic properties of FePt nanoparticles". United States. https://doi.org/10.1063/1.4822172.
@article{osti_22217970,
title = {Influence of surface segregation on magnetic properties of FePt nanoparticles},
author = {Lv, Hongyan and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072 and Lei, Yinkai and Datta, Aditi and Wang, Guofeng},
abstractNote = {Surface segregation leads to chemical disordering in magnetic alloy nanostructures and thus could have profound impact upon the magnetic properties of these nanostructures. In this study, we used the first-principles density functional theory calculation method to determine how Pt surface segregation (exchanging interior Pt with surface Fe atoms) would affect the magnetic properties of L1{sub 0} ordered FePt nanoparticles. For both cuboid and cuboctahedral FePt nanoparticles, we predicted that the Pt surface segregation process could cause a decrease in total magnetic moments, a change in (easy and/or hard) magnetization axes, and a reduction in magnetic anisotropy.},
doi = {10.1063/1.4822172},
url = {https://www.osti.gov/biblio/22217970}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 13,
volume = 103,
place = {United States},
year = {Mon Sep 23 00:00:00 EDT 2013},
month = {Mon Sep 23 00:00:00 EDT 2013}
}