Coexistence of Half-Metallic Itinerant Ferromagnetism with Local-Moment Antiferromagnetism in Ba0.60K0.40Mn2As2

TitleCoexistence of Half-Metallic Itinerant Ferromagnetism with Local-Moment Antiferromagnetism in Ba0.60K0.40Mn2As2
Publication TypeJournal Article
Year of Publication2013
AuthorsPandey A, Ueland BG, Yeninas S, Kreyssig A, Sapkota A, Zhao Y, Helton JS, Lynn JW, McQueeney RJ, Furukawa Y, Goldman AI, Johnston DC
Journal TitlePhysical Review Letters
Volume111
Pages047001
Date Published07
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberWOS:000322116100014
Keywordshigh-temperature superconductivity, iron pnictides, weak ferromagnetism
Abstract

Magnetization, nuclear magnetic resonance, high-resolution x-ray diffraction, and magnetic field-dependent neutron diffraction measurements reveal a novel magnetic ground state of Ba0.60K0.40Mn2As2 in which itinerant ferromagnetism (FM) below a Curie temperature T-C approximate to 100 K arising from the doped conduction holes coexists with collinear antiferromagnetism (AFM) of the Mn local moments that order below a Neel temperature T-N 480 K. The FM ordered moments are aligned in the tetragonal ab plane and are orthogonal to the AFM ordered Mn moments that are aligned along the c axis. The magnitude and nature of the low-T FM ordered moment correspond to complete polarization of the doped-hole spins (half-metallic itinerant FM) as deduced from magnetization and ab-plane electrical resistivity measurements.

URL<Go to ISI>://WOS:000322116100014
DOI10.1103/PhysRevLett.111.047001