Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session F24: Kitaev and Other Spin Orbit Coupled Systems
11:15 AM–2:15 PM,
Tuesday, March 6, 2018
LACC Room: 403A
Sponsoring Units: GMAG DMP
Chair: Itamar Kimchi, Massachusetts Institute of Technology-MIT
Abstract: F24.00013 : Antiferromagnetism in the Geometrically Frustrated Orthorhombic Li4MgReO6*
2:03 PM–2:15 PM
(California State University - Long Beach)
The exotic physics revealed in geometrically frustrated materials has led to a search for families of geometrically frustrated systems which may be systematically studied. Familiar frustrated systems include the Kagome, pyrochlore, spinel, stacked trianguler, and face-centered cubic systems. Less well-known are the so-called "rock salt ordered" A5BO6 systems, particularly with high-Z magnetic ions exhibiting strong spin-orbit coupling on the B site. These systems tend to crystallize in either monoclinic (C2/m) or orthorhombic (Fddd) crystal settings, with somewhat different exchange parameters in each case, and these systems exhibit a wide range of ground states ranging from commensurate antiferromagnetism to spin-glass behavior. Li4MgReO6 had been previously synthesized in the monoclinic space group, exhibiting AFM order at 12K. Here we report synthesis of Li4MgReO6 in the orthorhombic space group, and characterization using magnetic susceptibility and muon spin relaxation, finding AFM order setting in below 2K.
*We acknowledge the Research Corporation for Science Advancement for financial support, and the TRIUMF CMMS for assistance with muon spin relaxation experiments.
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