V A Chernenko et al 2005 J. Phys.: Condens. Matter 17 5215 doi:10.1088/0953-8984/17/34/006
Magnetic domains in Ni–Mn–Ga martensitic thin films
V A Chernenko1,4, R Lopez Anton2, M Kohl1, M Ohtsuka3, I Orue2 and J M Barandiaran2
Show affiliationsA series of martensitic Ni52Mn24Ga24 thin films deposited on alumina ceramic substrates has been prepared by using RF (radio-frequency) magnetron sputtering. The film thickness, d, varies from 0.1 to 5.0 µm. Magnetic domain patterns have been imaged by the MFM (magnetic force microscopy) technique. A maze domain structure is found for all studied films. MFM shows a large out-of-plane magnetization component and a rather uniform domain width for each film thickness. The domain width, δ, depends on the film thickness as 
in the whole studied range of film thickness. This dependence is the expected one for magnetic anisotropy and magnetostatic contributions in a perpendicular magnetic domain configuration. The proportionality coefficient is also consistent with the values of saturation magnetization and magnetic anisotropy determined in the samples.
- PACS
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75.70.Ak Magnetic properties of monolayers and thin films
68.55.-a Thin film structure and morphology
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
- Subjects
- Dates
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Issue 34 (31 August 2005)
Received 15 April 2005, in final form 30 June 2005
Published 12 August 2005
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Magnetic domains in Ni–Mn–Ga martensitic thin films
V A Chernenko et al 2005 J. Phys.: Condens. Matter 17 5215
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