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Title: Magnetic modification at sub-surface of FeRh bulk by energetic ion beam irradiation

Ferromagnetic layered structure has been made at sub-surface of the antiferromagnetic FeRh bulk samples by high energy He ion beam irradiation. In accordance with the Transport of Ions in Matter simulation, such ion beam can effectively deposit the elastic collision energy in several μm regions in the depth from the surface. Measurement with a superconducting quantum interference device reveals the irradiated samples to be ferromagnetic. Assuming that only the part the energy deposited can be modified to be ferromagnetic, the corresponding irradiation induced magnetization is consistent with the data that we previously reported. On the other hand, the X-ray magnetic circular dichroism (XMCD) spectra for the irradiated samples are totally unchanged as those for the unirradiated samples. Since XMCD signal in total emission yield method is considered to be surface sensitive with a typical probing depth of several nm, the surface magnetic state is maintained to be antiferromagnetic. By utilizing these phenomena, three-dimensional magnetic patterning of FeRh can be realized, which may potentially be used for future magnetic exchange device application such as nano-scale sensors and memories.
Authors:
;  [1] ; ;  [2] ; ;  [3] ;  [4]
  1. Department of Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531 (Japan)
  2. S. H. I. Examination and Inspection, Ltd., Saijo, Ehime 799-1393 (Japan)
  3. High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801 (Japan)
  4. Research Organization for the 21st Century, Osaka Prefecture University, Sakai, Osaka 599-8531 (Japan)
Publication Date:
OSTI Identifier:
22410154
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 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; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; FERROMAGNETIC MATERIALS; FERROMAGNETISM; HELIUM IONS; INTERMETALLIC COMPOUNDS; IRON; IRRADIATION; MAGNETIC CIRCULAR DICHROISM; MAGNETIZATION; POTENTIALS; RHODIUM; SENSORS; SQUID DEVICES; SURFACES; TAIL IONS; THREE-DIMENSIONAL LATTICES; X RADIATION