Authors Referees APS Members |
December 2007, to be published in Physical Review B1
Magnetovolume effect in Mn3Cu1-xGexN related to the magnetic structure:
Neutron powder diffraction measurements
Magnetic structures in an antiperovskite system, Mn$_3$Cu$_{1-x}$Ge$_x$N, with a large magneto-volume effect above {\it x} =0.15 have been studied by neutron powder diffraction measurement. The present neutron study revealed that not only a cubic crystal structure but also a $\Gamma^{5g}$ antiferromagnetic spin structure are key ingredients of the large magneto-volume effect in this itinerant electron system. The large magneto-volume effect is possibly ascribed to the geometrical frustration originating from the corner-shared octahedra of the antiperovskite structure. © 2008 The American Physical Society.
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