| 학회 |
한국재료학회 |
| 학술대회 |
2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 |
22권 1호 |
| 발표분야 |
A. 전자/반도체 재료 분과 |
| 제목 |
Effect of Ca doping on the structural, magnetic and magnetocaloric properties of double perovskite Sr2-xCaxFeMoO6 |
| 초록 |
In the recent decades the A-site substituted perovskite oxides A2BB’O6 have attracted much attention in the field of material science due to their various intresting properties and possible applications. Materials with magnetocaloric effects (MCE) hold great promise for applications as active agents in magnetic refrigeration. The effects of the partial substitution of Ca for Sr on the structural, magnetic and magnetocaloric properties of the double perovskite Sr2FeMoO6 have been investigated. Polycrystalline Sr2-xCaxFeMoO6 (x = 0.0, 0.1, 0.2, 0.3) samples have been prepared by using the conventional solid state reaction method. To avoid the formation of undesirable secondary phases, the samples were synthesized in the reducing atmosphere, created by a gas mixture of 5% H2/95% Ar. The structure, microstructure and phase purity of the samples have been investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD study shows that all the samples crystallize in a tetragonal structure with I4/mmm space group. Small quantities of impurity phases were also detected in the parent sample among which SrMoO4 is the most prominent. The variation of magnetization (M) as a function of temperature and applied magnetic field was carried out. All the samples exhibit a paramagnetic to ferromagnetic phase transition at the Curie temperature, TC. A magnetocaloric effect has been calculated in terms of isothermal magnetic entropy change. A significant variation in the magnetocaloric properties of the samples was observed with the increasing Ca content. This investigation suggests that Sr2-xCaxFeMoO6 can be used as a potential candidate material for magnetocaloric applications. |
| 저자 |
Imad Hussain, M.S. Anwar, Bon Heun KOO
|
| 소속 |
Changwon National Univ. |
| 키워드 |
Magnetization; Magnetocaloric effect; Entropy
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| E-Mail |
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