Magnetic ordering of Mn and Ru in (La-0.52 Ba-0.48)(Mn0.51Ru0.49)O-3
Journal
Physica Status Solidi B-Basic Solid State Physics
Journal Volume
244
Journal Issue
6
Pages
2233-2241
Date Issued
2007
Author(s)
Abstract
Neutron diffraction, de magnetization, and ac magnetic susceptibility measurements have been performed to study the magnetic properties of perovskite (La0.52Ba0.48)(Mn0.51Ru0.49)O 3. The compound crystallizes into a cubic Pm3m symmetry with a lattice constant of a = 3.9661(4) Å at room temperature. Two anomalies, at around 160 and 60 K, can clearly be seen in the ac susceptibility results, with the peak positions for both anomalies shifting to a higher temperature as a dc magnetic field is applied. Neutron magnetic diffraction measurements show that the anomalies that occur at high and low temperatures are associated with the ferromagnetic ordering of the Mn and the Ru spins, respectively. The ordering temperatures for the Mn and Ru spins were found to be Tc (Mn) ≈ 195 K and Tc (Ru) ≈ 80 K, with a saturated moment of 〈μ2-Mn〉= 2.21(5)μB for the Mn spins and 〈μ2-Ru〉 = 1.00(5)μB for the Ru spins. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.
Type
journal article