The Investigation of Structural, Magnetic and Magnetocaloric Properties of (La 0.9 Er 0.1 ) 0.85 K 0.15 MnO 3 Manganite Compound

In this study, the structural, magnetic and magnetocaloric properties of the polycrystalline (La 0.9 Er 0.1 ) 0.85 K 0.15 MnO 3 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 -1 -1 change (∆S max M ) of the sample has been calculated as 2.30 Jkg K for magnetic field change of 5 T from isothermal magnetization curves.

(La 0.9 Er 0.1 ) 0.85 K 0.15 MnO 3 Manganit Bileşiğinin Yapısal, Manyetik ve Manyetokalorik Özelliklerinin Araştırılması

Bu çalışmada, sol-jel yöntemi ile sentezlenen polikristal (La 0.9 Er 0.1 ) 0.85 K 0.15 MnO 3 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 (∆S mak. M ) izotermal mıknatıslanma eğrilerinden 5 T manyetik alan değişimi için 2.30 Jkg -1 K -1 olarak hesaplanmıştır.

PDF

___

Brück, E., 2005. Developments in magnetocaloric refrigeration. Journal of Physics D: Applied Physics, 38, R381-R391.

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.

Phan, M.H, Yu, S.C., 2007. Review of the Magnetocaloric Effect in Manganite Materials, Journal of Magnetism and Magnetic Materials 308, 325-340.

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.

Anwar, M.S., Ahmed, F., Koo, B.H., 2015. Influence of Ce Addition on the Structural, Magnetic and Magnetocaloric Properties in La 0.7-x Ce x Sr 0.3 MnO 3 (0≤x≤0.3) Ceramic Compound. Ceramics International, 41, 5821-5829.

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.

Akça, G., Kılıç Çetin, S., Ekicibil, A., 2017. Structural, Magnetic and Magnetocaloric Properties of (La 1-x Sm x ) 0.85 K 0.15 MnO 3 (x = 0.0, 0.1, 0.2 and 0.3) perovskite manganites. Ceramics International, 43, 15811-15820.

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 Pr 0.55 K 0.05 Sr 0.4 MnO 3 . J. Alloy. Comp. 611, 427–432.

Akça, G., Kılıç Çetin, S., Güneş, M., Ekicibil, A., 2016. Magnetocaloric Properties of (La 1- x Pr x ) 0.85 K 0.15 MnO 3 (x=0.0, 0.1, 0.3 and 0.5) Perovskite Manganites. Ceramics International, 42, 19097-19104.

Kallel, N., Kallel, S., Peňa, O., Oumezzine, M., 2009. Structural and Magnetic Properties of Hole Doped (La 0.56 Ce 0.14 )Sr 0.30 MnO 3 Perovskite. Solid State Sciences 11, 1494-1498.

Wang, Z., Xu, Q., Chen, K., 2012. Maximum Magnetic Entropy Change Modulated Toward Room Temperature in Perovskite Manganites La 0.7-x Nd x (Ca,Sr) 0.3 MnO 3 , Current Applied Physics, 12, 1153-1157.

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 La 0.7 Ca 0.2 Sr 0.1 Mn 1-x Cr x O 3 (x= 0.15 and 0.2). Journal of Alloys and Compounds 618, 788–794.

Lakshami, Y.K., Venkataiah, G. Vithal, M., Reddy, P.V., 2008. Magnetic and Electrical Behavior of La 1-x A x MnO 3 (A = Li, Na, K and Rb) Manganites. Physica B, 403, 3059-3066.

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 La 0.9-x Pr x Te 0.1 MnO 3 (0≤x≤0.9). Physical Review B 70, 144421.

Kılıç Ç.S., Ekicibil, A., 2017. Determination of Magnetocaloric Effect in La 0.67 Ba 0.33 MnO 3 from Direct and Indirect Measurements, Çukurova University, Journal of the Faculty of Engineering and Architecture 32(1), 141-145.

Tishin, A.M., Spichkin, Y.I., 2003. The Magnetocaloric Effect and its Applications, IOP Publishing LTD.

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 La 0.5 Ca 0.5 MnO 3 , Journal of Magnetism and Magnetic Materials 401, 593-599.

Banerjee, B.K., 1964. On a Generalised Approach to First and Second Order Magnetic Transitions, Phys. Lett. 12, 16-17.