Effect of pulsed laser irradiation on the structural and the magnetic properties of NiMn/Co exchange bias system

Journal Article · Tue Apr 01 00:00:00 EDT 2008 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2829246· OSTI ID:21137296

Mohanan, Senthilnathan; Diebolder, Rolf; Hibst, Raimund; Herr, Ulrich ^[1]

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1. Institute of Micro and Nanomaterials, Ulm University, 89081 Ulm (Germany)

We report about the influence of pulsed laser irradiation on the structural and magnetic properties of NiMn/Co thin films. Rocking curve measurements showed a significant improvement of the (111) texture of NiMn after laser irradiation which was accompanied by grain growth. We have studied the ordering transition in as-prepared and irradiated (laser fluence of 0.15 J/cm{sup 2}) samples during subsequent annealing. The onset of the fcc to fct phase transformation occurs at 325 deg. C irrespective of laser irradiation. Exchange bias fields for the laser irradiated samples are higher than those of the as-prepared samples. The observed increase in the exchange bias field for laser irradiated samples has been attributed to the increased grain size and the improved (111) texture of the NiMn layer after laser irradiation.

• OSTI ID: 21137296
• Journal Information: Journal of Applied Physics, Vol. 103, Issue 7; Conference: 52. annual conference on magnetism and magnetic materials, Tampa, FL (United States), 5-9 Nov 2007; Other Information: DOI: 10.1063/1.2829246; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
ANTIFERROMAGNETIC MATERIALS
BINARY ALLOY SYSTEMS
COBALT
EXCHANGE INTERACTIONS
FCC LATTICES
FERROMAGNETIC MATERIALS
GRAIN GROWTH
GRAIN SIZE
LASER RADIATION
LASERS
MAGNETIC PROPERTIES
MANGANESE ALLOYS
NEUTRON DIFFRACTION
NICKEL ALLOYS
PHASE TRANSFORMATIONS
TEXTURE
THIN FILMS