| 학회 |
한국재료학회 |
| 학술대회 |
2018년 봄 (05/16 ~ 05/18, 삼척 쏠비치 호텔&리조트) |
| 권호 |
24권 1호 |
| 발표분야 |
A. 전자/반도체 재료 분과 |
| 제목 |
Structural, magnetic and magnetocaloric properties of the Sr- and Mo-site co-doped Sr1.8Pr0.2FeMo1-xWxO6 |
| 초록 |
Magnetocaloric phenomenon has attracted much attention over the recent few years in the field of material science. Materials with magnetocaloric effects (MCE) hold great promise for applications as active agents in magnetic refrigeration. In the present work, the structural, magnetic as well as magnetocaloric properties of the Sr1.8Pr0.2FeMo1-xWxO6 (0.0 ≤ x ≤ 0.4) samples synthesized by solid state reaction method were investigated. The structural analysis confirmed the formation of the tetragonal (I4/mmm) structure with a small impurity phase of SrMoO4 in the doped samples. Both the temperature and field dependent magnetization measurements confirmed that all the samples went through a ferromagnetic to paramagnetic phase transition upon cooling. No significant change in magnetization as well as TC was observed with the increasing W-doping (up to x = 0.2) which was attributed to the competing interaction between the double exchange interaction and the super exchange interaction (arising due to anti-site disorder). The decrease in magnetization with the increased W-doping (x ≥ 0.3) is mainly due to the increased anti-site disorder and reduced orbital hybridization between the Fe-Mo/W cations. The Arrott plots confirmed the second order nature of the magnetic phase transition in all the samples. The RCP value was observed to decrease with the increasing W-doping which is attributed to the gradual decrease in the δTFWHM value with the increasing W-doping. However, the RCP was observed to increase with the applied magnetic field. The simple fabrication techniques, tunable magnetic and magnetocaloric properties and the adjustable Curie temperature of the synthesized samples make them desirable candidate materials for applications in magnetic refrigeration technology. |
| 저자 |
Imad Hussain, Min Soo Kim, Bon Heun Koo
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| 소속 |
Changwon National Univ. |
| 키워드 |
Magnetization; Magnetocaloric effect; Double Perovskite; XRD; Magnetic refrigeration
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| E-Mail |
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