Lattice contraction, magnetic structures and “lattice-spin-charge” coupling in Mn3XN(C) antiperovskite compounds

Orateur : Cong WANG (University of Bejing)

There exist abundant magnetic structures, including non-collinear, frustration and spin glass magnetic configurations in antiperovskite Mn3XN(C) compounds, which display very interesting physical properties. Herein we show abnormal lattice contraction, baromagnetic effect, nearly zero temperature coefficient of resistance due to strong “lattice-spin-charge” coupling in some special magnetic phase, which can be tunable over a wide temperature range by chemical doping, introduce of vacancies and high pressure, such as in Mn3ZnN, and Mn3GaN, which are analyzed by powder X-ray diffraction and neutron diffraction.

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