Large magneto-optical Kerr effect in noncollinear antiferromagnets<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Mn</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi>X</mml:mi></mml:mrow><mml:mspace width="0.28em" /><mml:mo>(</mml:mo><mml:mi>X</mml:mi><mml:mo>=</mml:mo><mml:mi>Rh</mml:mi><mml:mo>,</mml:mo><mml:mspace width="0.28em" /><mml:mi>Ir</mml:mi><mml:mo>,</mml:mo><mml:mspace width="0.28em" /><mml:mi>Pt</mml:mi><mml:mo>)</mml:mo></mml:…
Large magneto-optical Kerr effect in noncollinear antiferromagnets<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Mn</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi>X</mml:mi></mml:mrow><mml:mspace width="0.28em" /><mml:mo>(</mml:mo><mml:mi>X</mml:mi><mml:mo>=</mml:mo><mml:mi>Rh</mml:mi><mml:mo>,</mml:mo><mml:mspace width="0.28em" /><mml:mi>Ir</mml:mi><mml:mo>,</mml:mo><mml:mspace width="0.28em" /><mml:mi>Pt</mml:mi><mml:mo>)</mml:mo></mml:…
Magneto-optical Kerr effect, normally found in magnetic materials with nonzero magnetization such as ferromagnets and ferrimagnets, has been known for more than a century. Here, using first-principles density functional theory, we demonstrate large magneto-optical Kerr effect in high temperature noncollinear antiferromagnets Mn$_{3}X$ ($X$ = Rh, Ir, or Pt), in contrast …