Canted magnetic ground state of quarter-doped manganites R0.75Ca0.25MnO3 (R  =  Y, Tb, Dy, Ho, and Er). (21st December 2016)

• Record Type: Journal Article
• Authors: Sinclair, R; Cao, H B; Garlea, V O; Lee, M; Choi, E S; Dun, Z L; Dong, S; Dagotto, E; Zhou, H D
• Is Part Of: Journal of physics. Volume 29:Number 6(2017)
• Publication Date: 2016-12-21
• Subjects: magnetic materials -- magnetoelectrics -- spin glass; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa4de1
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Polycrystalline samples of the quarter-doped manganites R 0.75 Ca0.25 MnO3 ( R = Y, Tb, Dy, Ho, and Er) were studied by x-ray diffraction and AC/DC susceptibility measurements. All five samples are orthorhombic and exhibit similar magnetic properties: enhanced ferromagnetism below T 1 (̃80 K) and a spin glass (SG) state below T SG (̃30 K). With increasing R 3+ ionic size, both T 1 and T SG generally increase. The single crystal neutron diffraction results on Tb0.75 Ca0.25 MnO3 revealed that the SG state is mainly composed of a short-range ordered version of a novel canted (i.e. noncollinear) antiferromagnetic spin state. Furthermore, calculations based on the double exchange model for quarter-doped manganites reveal that this new magnetic phase provides a transition state between the ferromagnetic state and the theoretically predicted spin-orthogonal stripe phase.