(La0.9Er0.1)0.85K0.15MnO3 Manganit Bileşiğinin Yapısal, Manyetik ve Manyetokalorik Özelliklerinin Araştırılması

Bu çalışmada, sol-jel yöntemi ile sentezlenen polikristal (La0.9Er0.1)0.85K0.15MnO3 manganit bileşiğinin yapısal, manyetik ve manyetokalorik özellikleri çalışılmıştır. Oda sıcaklığında x-ışını kırınımı ölçümü, numunenin rhombohedral yapıda kristalleştiğini göstermektedir. Sıcaklığa bağlı manyetizasyon ölçümleri, artan sıcaklıkla numunenin ferromanyetik-paramanyetik faz geçişi sergilediğini göstermektedir. Numunenin maksimum manyetik entropi değişimi (∆SMmak.) izotermal mıknatıslanma eğrilerinden 5 T manyetik alan değişimi için 2.30 Jkg-1K-1 olarak hesaplanmıştır.

Anahtar Kelimeler:

Manganit, Manyetokalorik etki, Manyetik soğutma, Curie sıcaklığı

The Investigation of Structural, Magnetic and Magnetocaloric Properties of (La0.9Er0.1)0.85K0.15MnO3 Manganite Compound

In this study, the structural, magnetic and magnetocaloric properties of the polycrystalline (La0.9Er0.1)0.85K0.15MnO3 manganite compound synthesized by sol-gel method have been studied. X-ray diffraction measurement at room temperature shows that the sample crystallizes in rhombohedral structure. The temperature dependence of magnetization measurement reveals that the sample undergoes ferromagnetic-paramagnetic phase transition with increasing temperature. Maximum magnetic entropy change (∆SMmax) of the sample has been calculated as 2.30 Jkg-1K-1 for magnetic field change of 5 T from isothermal magnetization curves.

Keywords:

Manganite, Magnetocaloric effect, Magnetic refrigeration, Curie temperature,

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1. Brück, E., 2005. Developments in magnetocaloric refrigeration. Journal of Physics D: Applied Physics, 38, R381-R391.
2. Tishin, A.M., Spichkin, Y.I. Zverev, V.I, Egolf, P.W., 2016. A Review and New Perspectives for the Magnetocaloric Effect: New Materials and local heating and cooling inside the human body. International Journal of Refrigeration 68, 177-186.
3. Phan, M.H, Yu, S.C., 2007. Review of the Magnetocaloric Effect in Manganite Materials, Journal of Magnetism and Magnetic Materials 308, 325-340.
4. Thang, N.V., Miao, X.F., van Dijk, N.H., Brück, E., 2016. Structural and Magnetocaloric Properties of (Mn,Fe)2(P,Si) Materials with Added Nitrogen. Journal of Alloys and Compounds, 670, 123-127.
5. Anwar, M.S., Ahmed, F., Koo, B.H., 2015. Influence of Ce Addition on the Structural, Magnetic and Magnetocaloric Properties in La0.7-xCexSr0.3MnO3 (0≤x≤0.3) Ceramic Compound. Ceramics International, 41, 5821-5829.
6. Spichkin, Y.I., Tishin, A.M., 2005. Thermodynamic Model of the Magnetocaloric Effect Near the First-order Magnetic Phase Transitions. Journal of Magnetism and Magnetic Materials 290-291, 700-702.
7. Akça, G., Kılıç Çetin, S., Ekicibil, A., 2017. Structural, Magnetic and Magnetocaloric Properties of (La1-xSmx)0.85K0.15MnO3 (x = 0.0, 0.1, 0.2 and 0.3) perovskite manganites. Ceramics International, 43, 15811-15820.
8. Thaljaoui, R., Boujelben, W., Pȩkała, M., Pȩkała, K., Antonowicz, J., Fagnard, J.F., Vanderbemden, P., Dąbrowska, S., Mucha, J., 2014. Structural, Magnetic and Magneto- Transport Properties of Monovalent Doped Manganite Pr0.55K0.05Sr0.4MnO3. J. Alloy. Comp. 611, 427–432.
9. Akça, G., Kılıç Çetin, S., Güneş, M., Ekicibil, A., 2016. Magnetocaloric Properties of (La1-xPrx)0.85K0.15MnO3 (x=0.0, 0.1, 0.3 and 0.5) Perovskite Manganites. Ceramics International, 42, 19097-19104.
10. Kallel, N., Kallel, S., Peňa, O., Oumezzine, M., 2009. Structural and Magnetic Properties of Hole Doped (La0.56Ce0.14)Sr0.30MnO3 Perovskite. Solid State Sciences 11, 1494-1498.
11. Wang, Z., Xu, Q., Chen, K., 2012. Maximum Magnetic Entropy Change Modulated Toward Room Temperature in Perovskite Manganites La0.7-xNdx(Ca,Sr)0.3MnO3, Current Applied Physics, 12, 1153-1157.
12. Dhahri, A., Jemmali, M., Hussein, M., Dhahri, E., Koumina, A., Hlil, E.K., 2015. Critical Behavior Near the Ferromagnetic to Paramagnetic Phase Transition Temperature in Polycrystalline La0.7Ca0.2Sr0.1Mn1-xCrxO3 (x= 0.15 and 0.2). Journal of Alloys and Compounds 618, 788–794.
13. Lakshami, Y.K., Venkataiah, G. Vithal, M., Reddy, P.V., 2008. Magnetic and Electrical Behavior of La1-xAxMnO3 (A = Li, Na, K and Rb) Manganites. Physica B, 403, 3059-3066.
14. Yang, J., Song, W.H., Ma, Y.Q, Zhang, R.L., Zhao, B.C., Sheng, Z.G., Zheng, G.H., Dai, J.M., Sun,Y.P., 2004. Structural, Magnetic and Transport Properties in the Pr-doped Manganites La0.9-xPrxTe0.1MnO3 (0≤x≤0.9). Physical Review B 70, 144421.
15. Kılıç Ç.S., Ekicibil, A., 2017. Determination of Magnetocaloric Effect in La0.67Ba0.33MnO3 from Direct and Indirect Measurements, Çukurova University, Journal of the Faculty of Engineering and Architecture 32(1), 141-145.
16. Tishin, A.M., Spichkin, Y.I., 2003. The Magnetocaloric Effect and its Applications, IOP Publishing LTD.
17. Mansouri, M., Omrani, H. Cheikhrouhou-Koubaa, W., Koubaa, M., Madouri, A., Cheikhrouhou, A., 2016. Effect of Vanadium Doping on Structural, Magnetic and Magnetocaloric Properties of La0.5Ca0.5MnO3, Journal of Magnetism and Magnetic Materials 401, 593-599.
18. Banerjee, B.K., 1964. On a Generalised Approach to First and Second Order Magnetic Transitions, Phys. Lett. 12, 16-17.