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<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mtext>Ba</mml:mtext><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mtext>YIrO</mml:mtext><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>: A cubic double perovskite material with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mtext>Ir</mml:mtext><mml:mrow><mml:mn>5</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:math>ions
Materials with a $5{d}^{4}$ electronic configuration are generally considered to have a nonmagnetic ground state ($J=0$). Interestingly, ${\mathrm{Sr}}_{2}{\mathrm{YIrO}}_{6}$ (${\mathrm{Ir}}^{5+}$ having $5{d}^{4}$ electronic configuration) was recently reported to exhibit long-range magnetic order at low temperature and the distorted ${\mathrm{IrO}}_{6}$ octahedra were discussed to cause the magnetism in this material. Hence, a …