Persistence of local-moment antiferromagnetic order in Ba1-xKxMn2As2

TitlePersistence of local-moment antiferromagnetic order in Ba1-xKxMn2As2
Publication TypeJournal Article
Year of Publication2013
AuthorsLamsal J, Tucker GS, Heitmann TW, Kreyssig A, Jesche A, Pandey A, Tian W, McQueeney RJ, Johnston DC, Goldman AI
Journal TitlePhysical Review B
Volume87
Pages144418
Date Published04
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000317964700002
KeywordsINSULATOR, metal
Abstract

BaMn2As2 is a local-moment antiferromagnetic insulator with a Neel temperature T-N of 625 K and a large ordered moment of 3.9 mu(B)/Mn. Remarkably, this compound can be driven metallic by the substitution of as little as 1.6% K for Ba while retaining essentially the same ordered magnetic moment and Neel temperature, as previously reported. Here, using both powder and single crystal neutron diffraction we show that the local moment antiferromagnetic order in Ba1-xKxMn2As2 remains robust up to x = 0.4. The ordered moment is nearly independent of x for 0 <= x <= 0.4 and T-N decreases to 480 K at x = 0.4. DOI: 10.1103/PhysRevB.87.144418

URL<Go to ISI>://WOS:000317964700002http://prb.aps.org/pdf/PRB/v87/i14/e144418
DOI10.1103/PhysRevB.87.144418