Exotic magnetism and spin-orbit-assisted Mott insulating state in a 3d-5d double perovskite

Author(s)

Cavichini, A. S. ; Orlando, M. T. ; Depianti, J. B. ; Passamai, J. L., Jr. ; Damay, F. ; Porcher, F. ; Granado, E.

• Document type: Journal article
• Source: PHYSICAL REVIEW B; v. 97, n. 5, p. 6-pg., 2018-02-28.

Abstract

Themagnetic structure of Ca2MnReO6 double perovskite is investigated by neutron powder diffraction and bulk magnetization, showing dominant noncollinear Mn magnetic moments [4.35(7) mu(B)] that are orthogonally aligned with the small Re moments [0.22(4) mu(B)]. Ab initio electronic structure calculations show that the strong spin-orbit coupling for Re 5d electrons combined with a relatively modest on-site Coulomb repulsion (U-eff(Re) greater than or similar to 0.6 eV) is sufficient to render this material insulating. This is a rare example of spin-orbit-assisted Mott insulator outside the realm of iridates, with remarkable magnetic properties. (AU)

• FAPESP's process: 12/04870-7 - Studies of novel complex and advanced materials
• Grantee: Pascoal Jose Giglio Pagliuso
• Support Opportunities: Research Projects - Thematic Grants