Published September 23, 2013 | Version v1
Journal article Metadata-only

Influence of surface segregation on magnetic properties of FePt nanoparticles

Creators

  • 1. Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072 (China)
  • 2. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261 (United States)

Description

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 L10 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

Additional details

Identifiers

DOI
10.1063/1.4822172;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
103
Journal Issue
13
Journal Page Range
p. 132405-132405.4
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
45038936
Subject category
S77: NANOSCIENCE AND NANOTECHNOLOGY; S36: MATERIALS SCIENCE;
Descriptors DEI
ANISOTROPY; ATOMS; DENSITY FUNCTIONAL METHOD; IRON ALLOYS; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MAGNETIZATION; NANOSTRUCTURES; PLATINUM ALLOYS; REDUCTION; SEGREGATION; SURFACES
Descriptors DEC
ALLOYS; CALCULATION METHODS; CHEMICAL REACTIONS; PHYSICAL PROPERTIES; PLATINUM METAL ALLOYS; TRANSITION ELEMENT ALLOYS; VARIATIONAL METHODS

Optional Information

Notes
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