1. Structural, magnetic and magnetocaloric properties of sputtered Gd films
- Author
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Sunkara V. Manorama, Lanka Satyanarayana, V. Shaleni, N. Pavan Kumar, and M. Manivel Raja
- Subjects
Materials science ,Condensed matter physics ,Ultra-high vacuum ,Magnetic refrigeration ,Crystal structure ,Sputter deposition ,Microstructure ,Single crystal ,Isothermal process ,Magnetic field - Abstract
Gd films with different thicknesses varying from 100 nm to 750 nm have been deposited on single crystal Si (100) substrate by ultra high vacuum magnetron sputtering system. X-ray diffraction analysis reveals the crystalline nature and hcp crystal structure of the films. Microstructure investigations have been carried to study the surface morphology of the films. Thermo magnetic studies confirm the magnetic transition of the films and are ∼275 K, close to bulk. Magnetocaloric effect (MCE) has been studied from magnetic isotherms measured around magnetic transition and the maximum isothermal entropy change of 2.0 J/kg-K is achieved for a magnetic field change of 2 T for the 750 nm film. The sputtered Gd films are useful for micro cooling device applications.
- Published
- 2018
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