Publication Type
Journal
Journal Name
Physical Review B
Publication Date
Volume
92
Issue
13
Abstract
Insulating 5d(3) La3OsO7 and the isostructural hole-doped analog La2.8Ca0.2OsO7 that feature pseudo-one-dimensional zigzag chains of corner-sharing OsO6 octahedra have been synthesized and their magnetic and electrical transport properties characterized. Both compounds are insulating antiferromagnets. Long range magnetic order between the antiferromagnetic chains is determined with a propagation vector k = 1/2,1/2,1 and T-N = 45 and 33 K for the parent and doped materials. An Os5+ moment of 1.7(1)mu(B) for La3OsO7 and 1.2(2)mu(B) for La2.8Ca0.2OsO7 is refined. The long range magnetic structure is compared to the isostructural compounds La3RuO7 and La3MoO7, both of which adopt different magnetic structures.