skip to main content

SciTech ConnectSciTech Connect

Title: Magnetic anisotropy of Fe{sub 1−y}X{sub y}Pt-L1{sub 0} [X = Cr, Mn, Co, Ni, Cu] bulk alloys

We demonstrate by means of fully relativistic first principles calculations that, by substitution of Fe by Cr, Mn, Co, Ni, or Cu in FePt-L1{sub 0} bulk alloys, with fixed Pt content, it is possible to tune the magnetocrystalline anisotropy energy by adjusting the content of the non-magnetic species in the material. The changes in the geometry due to the inclusion of each element induces different values of the tetragonality and hence changes in the magnetic anisotropy and in the net magnetic moment. The site resolved magnetic moments of Fe increase with the X content while those of Pt and X are simultaneously reduced. The calculations are in good quantitative agreement with experimental data and demonstrate that models with fixed band structure but varying numbers of electrons per unit cell are insufficient to describe the experimental data for doped FePt-L1{sub 0} alloys.
Authors:
;  [1] ;  [2]
  1. Department of Physics, University of York, York YO10 5DD (United Kingdom)
  2. Seagate Technology, Fremont, California 94538 (United States)
Publication Date:
OSTI Identifier:
22350904
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; CHROMIUM COMPOUNDS; COBALT COMPOUNDS; COMPUTERIZED SIMULATION; COPPER COMPOUNDS; DOPED MATERIALS; INCLUSIONS; IRON COMPOUNDS; MAGNETIC MOMENTS; MANGANESE COMPOUNDS; NICKEL COMPOUNDS; PLATINUM COMPOUNDS; RELATIVISTIC RANGE; TERNARY ALLOY SYSTEMS