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Tran Dang Thanh,오석근,김동현,유성조,S.E. Demyanov,N.A. Kalanda,M.V. Yarmolich,L.V. Kovalev 한국물리학회 2014 Current Applied Physics Vol.14 No.6
In this work, the magnetic properties and critical behavior around ferromagneticeparamagnetic (FM ePM) phase transition in Ba1.7La0.3FeMoO6 compound have been investigated in detail. This compound exhibits a second-order magnetic phase transition with Curie temperature TC ¼ 345 K. The critical exponents b, g, and d that are determined by using the modified Arrott plots (MAP), the KouveleFisher (KF) and the critical isotherm analysis agree very well. Our results indicate a coexistence of short-range and long-range ferromagnetic (FM) interactions in Ba1.7La0.3FeMoO6 compound. The existence of long-range FM interactions in this compound can be associated with the crystal structure of materials with longrange Fe/Mo ordering parameter and strength of double-exchange interaction, whereas the existence of the short-range FM interactions can be explained by magnetic inhomogeneity and FM clusters.