Publication Date:
2016-07-26
Description:
A series of polycrystalline YMn 1−x Ru x O 3 (0 ≤ x ≤ 0.2) samples were prepared by traditional solid-state reaction method. Effects of doping on the microstructures and magnetic properties were investigated. Microstructural results reveal that samples crystallize in a single hexagonal structure with P 6 3 cm group for x ≤ 0.1. Lattice parameters a, c, and unit-cell volume of YMn 1−x Ru x O 3 are found to increase with doping content, which are ascribed to the larger radius of Ru 3+ than that of Mn 3+ . Weak ferromagnetism is found and is enhanced with increasing doping concentration x. The bond angles of Mn-O3-Mn and Mn-O4-Mn are changed in the opposite trends, which break the Mn-Mn exchange interaction, thus the antiferromagnetic ordering. The MnO 5 bipyramid is found to be relieved and the trimerization of Mn ions is weakened. These structural modifications result in the increase of weak ferromagnetism ordering in samples.
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics
Permalink
