216 citations · 773 across the 12 of their papers we have counts for
8 papers · 1 filter
Structural change and phase coexistence upon magnetic ordering in the magnetodielectric spinel MnO
Moureen C. Kemei, Jaye K. Harada, Ram Seshadri +1
Cooperative Jahn-Teller ordering is well-known to drive the cubic to tetragonal 4/ structural distortion in MnO at 1170 C. Further s…
Structural distortion below the Néel temperature in spinel GeCoO
Phillip T. Barton, Moureen C. Kemei, Michael W. Gaultois +5
A structural phase transition from cubic to tetragonal 4/ symmetry with 1 is observed at = 16 K in spinel GeCoO below the Néel…
Structural ground states of ()CrO(=Mg, Zn; = Co, Cu) spinel solid solutions: Spin-Jahn-Teller and Jahn-Teller effects
Moureen C. Kemei, Stephanie L. Moffitt, Lucy E. Darago +5
We examine the effect of small amounts of magnetic substituents in the sites of the frustrated spinels MgCrO and ZnCrO. Specifically we look for the effects of…
Magnetostructural transition, metamagnetism, and magnetic phase coexistence in Co10Ge3O16
Phillip T. Barton, Ram Seshadri, Anna Llobet +1
Co10Ge3O16 crystallizes in an intergrowth structure featuring alternating layers of spinel and rock salt. Variable-temperature powder synchrotron X-ray and neutron diffraction, mag…
Crystal structures of spin-Jahn-Teller ordered MgCr_2O_4 and ZnCr_2O_4
Moureen C. Kemei, Phillip T. Barton, Stephanie L. Moffitt +5
Magnetic ordering in the geometrically frustrated magnetic oxide spinels MgCr_2O_4 and ZnCr_2O_4 is accompanied by a structural change that helps relieve the frustration. Analysis…
Spin-induced symmetry breaking in orbitally ordered NiCr_2O_4 and CuCr_2O_4
Matthew R. Suchomel, Daniel P. Shoemaker, Lynn Ribaud +2
At room temperature, the normal oxide spinels NiCr_2O_4 and CuCr_2O_4 are tetragonally distorted and crystallize in the I4_1/amd space group due to cooperative Jahn-Teller ordering…