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arXiv · 1510.07519

Structure symmetry determination and magnetic evolution in $\rm Sr_2Ir_{1-x}Rh_{x}O_4$

Feng Ye·Xiaoping Wang·Christina Hoffmann·Jinchen Wang·Songxue Chi·Masaaki Matsuda·Bryan C. Chakoumakos·Jaime A. Fernandez-Baca·G. Cao
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Abstract

We use single-crystal neutron diffraction to determine the crystal structure symmetry and the magnetic evolution in the rhodium doped iridates $\rm Sr_2Ir_{1-x}Rh_{x}O_4$ ($0\leq x \leq 0.16$). Throughout this doping range, the crystal structure retains a tetragonal symmetry (space group $I4_1/a$) with two distinct magnetic Ir sites in the unit cell forming staggered $\rm IrO_6$ rotation. Upon Rh doping, the magnetic order is suppressed and the magnetic moment of Ir$^{4+}$ is reduced from 0.21 $\rm μ_B$/Ir for $x=0$ to 0.18 $\rm μ_B$/Ir for $x=0.12$. The magnetic structure at $x=0.12$ is different from that of the parent compound while the moments remain in the basal plane.

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Feng Ye, Xiaoping Wang, Christina Hoffmann, Jinchen Wang, Songxue Chi, Masaaki Matsuda, Bryan C. Chakoumakos, Jaime A. Fernandez-Baca, G. Cao. 2015-10-26. Structure symmetry determination and magnetic evolution in $\rm Sr_2Ir_{1-x}Rh_{x}O_4$. https://doi.org/10.1103/physrevb.92.201112

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