Impact of Ba Substitution on the Magnetocaloric Effect in La1-xBaxMnO3 Manganites

Imad Hussain; M. S. Anwar; Eunji Kim; Bon Heun Koo; Chan Gyu Lee

Korean Journal of Materials Research, Vol.26, No.11, 623-627, November, 2016

DOI10.3740/MRSK.2016.26.11.623 Export Citation

Impact of Ba Substitution on the Magnetocaloric Effect in La1-xBaxMnO3 Manganites

Imad Hussain, M. S. Anwar, Eunji Kim, Bon Heun Koo, and Chan Gyu Lee^†

School of Materials Science and Engineering, Changwon National University, Changwon 51140, Republic of Korea

E-mail:

La1-xBaxMnO3 (x = 0.30, 0.35 and 0.40) samples have been prepared by solid-state reaction method. The X-ray diffraction (XRD) study showed that all the samples crystallized in a rhombohedral structure with an R-3c space group. Variation of the magnetization as a function of the temperature and applied magnetic field was carried out. All the samples revealed ferromagnetic to paramagnetic (FM-PM) phase transition at the Curie temperature TC ~ 342 K. The magnetic entropy change was also studied through examination of the measured magnetic isotherms M(H, T) near TC. The magnetocaloric effect was calculated in terms of the isothermal magnetic entropy change. The maximum entropy change reaches a value of 1.192 J/kgK under a magnetic field change of 2.5T for the La0.6Ba0.4MnO3 composition. The relative cooling power (RCP) is 79.31 J/kg for the same applied magnetic field.

Keywords:magnetocaloric effect;magnetization;magnetic entropy;relative cooling power

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[2] Anwar MS, Koo BH, Elecron. Mater. Lett., 11, 614 (2015)

[3] Hussain I, Anwar MS, Kim JW, Chung KC, Koo BH, Ceram. Int., 42, 13098 (2016)

[4] Yu BF, Guo Q, Zhang B, Meng XZ, Chen Z, Int. J. Refrig. -Rev. Int. Froid, 26, 622 (2003)

[5] Phan MH, Yu SC, J. Magn. Magn. Mater., 308, 325 (2007)

[6] Caballero-Flores R, Franco V, Conde A, Knipling KE, Willard MA, Appl. Phys. Lett., 98, 102501 (2011)

[7] Gschneidner KA, Pecharsky VK, Annu. Rev. Mater. Sci., 30, 387 (2000)

[8] Tokura Y, Rep. Prog. Phys., 69, 797 (2006)

[9] Goodenough JB, Rep. Prog. Phys., 67, 1915 (2004)

[10] Attfield JP, Chem. Mater., 10, 3239 (1998)

[11] Millis AJ, Nature, 392(6672), 147 (1998)

[12] Pecharsky VK, Gschneidner KA, Phys. Rev. Lett., 78, 4494 (1997)

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[20] Rostamnejadi A, Venkatesan M, Kameli P, Salamati H, Coey JMD, J. Magn. Magn. Mater., 323, 2214 (2011)