Antiferromagnetic ordering in the absence of structural distortion in Ba(Fe1-xMnx)(2)As-2

TitleAntiferromagnetic ordering in the absence of structural distortion in Ba(Fe1-xMnx)(2)As-2
Publication TypeJournal Article
Year of Publication2010
AuthorsKim MG, Kreyssig A, Thaler A, Pratt DK, Tian W, Zarestky JL, Green MA, Bud'ko SL, Canfield PC, McQueeney RJ, Goldman AI
Journal TitlePhysical Review B
Date Published12
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000286758500001

Neutron and x-ray diffraction studies of Ba(Fe1-xMnx)(2)As-2 for low doping concentrations (x <= 0.176) reveal that at a critical concentration, 0.102 < x < 0.118, the tetragonal-to-orthorhombic transition abruptly disappears whereas magnetic ordering with a propagation vector of (1/2 1/2 1 ) persists. Among all of the iron arsenides this observation is unique to Mn doping, and unexpected because all models for "stripelike" antiferromagnetic order anticipate an attendant orthorhombic distortion due to magnetoelastic effects. We discuss these observations and their consequences in terms of previous studies of Ba(Fe1-xTMx)(2)As-2 compounds (TM = transition metal ), and models for magnetic ordering in the iron arsenide compounds.

URL<Go to ISI>://000286758500001
Alternate JournalPhys. Rev. B