Unconventional magnetism in the high pressure 'all transition metal' double perovskite Mn2NiReO6

Abstract

Mn2NiReO6, prepared at high pressure and temperature, has a highly-distorted double perovskite structure. Canted antiferromagnetic order is observed below TM1 = 80 K and an unusual continuous spin rotation of Mn spins occurs down to TM2 = 42 K where a collapse in weak ferromagnetism evidences an unprecedented switching of the weak ferromagnetic moment directions.