Eur. Phys. J. B 41, 213-217 (2004)
https://doi.org/10.1140/epjb/e2004-00312-9

Magnetocaloric effect in ordered double-perovskite Ba₂FeMoO₆ synthesized using wet chemistry

¹ National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for Nano Technology, Nanjing University, Nanjing 210093, P.R. China
² Department of Physics, Heibei Normal University, Shijiazhuang 050091, P.R. China
³ Chemistry Department and Center for Surface Analysis and Research, Hong Kong Baptist University, Kowloon Tong, Hong Kong

Corresponding author: ^a wzhong@ufp.nju.edu.cn

Received: 23 February 2004
Revised: 3 June 2004
Published online: 12 October 2004

Abstract

Double perovskite Ba₂FeMoO₆ has been prepared by a wet chemistry method and its magnetocaloric effect has been studied. The Ba₂FeMoO₆ sample, consisting of crystallites with diameter of 130 nm and average aspect ratio of 15, exhibits a sharp magnetic transition. The maximum of the magnetic entropy change peaks at its Curie temperature (340 K), and a large magnetic entropy change (1.54 J/kg K, or ~0.081 J/mol (atoms) K) is obtained upon 10 kOe applied magnetic field change. For comparison, the magnetic properties of Ba₂FeMoO₆ prepared by a conventional solid-state reaction was also investigated.