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Title: The influence of Nd dopants on spin and orbital moments in Nd-doped permalloy thin films

Magnetic properties of Nd{sub X}-Ni{sub 80}Fe{sub 20(1−X)} thin films have been investigated using x-ray absorption spectroscopy and x-ray magnetic circular dichroism (XMCD) at room temperature. With the Nd concentration increasing, the ratio of orbital-to-spin moment of Ni and Fe increases significantly, indicating that the spin-orbit coupling in permalloy thin films is enhanced due to the Nd impurities. The spin and orbital moments have been obtained by the sum rules analysis, which shows that the Nd impurities lead to a strong dispersion of spin moments of Fe and Ni while have no effect on orbital moments in Nd-doped permalloy thin films. Element-specific XMCD hysteresis loops suggest an antiferromagnetic coupling between the magnetic moments of Nd and permalloy at room temperature. The static magnetic properties have been studied by vibrating sample magnetometer for comparison, which shows a nice agreement with the XMCD results.
Authors:
; ;  [1] ;  [2] ;  [3] ; ; ;  [4]
  1. Physics Department, Southeast University, Nanjing 211189 (China)
  2. NanoElectronics Group, MESA+ Institute of Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede (Netherlands)
  3. (Singapore)
  4. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
22310959
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 8; 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; ABSORPTION SPECTROSCOPY; ANTIFERROMAGNETISM; DISPERSIONS; DOPED MATERIALS; HYSTERESIS; IMPURITIES; IRON ALLOYS; L-S COUPLING; MAGNETIC CIRCULAR DICHROISM; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; NICKEL ALLOYS; PERMALLOY; SPIN; SUM RULES; TEMPERATURE RANGE 0273-0400 K; THIN FILMS; VIBRATING SAMPLE MAGNETOMETERS; X RADIATION; X-RAY SPECTROSCOPY