Inverted hysteresis and negative remanence in a homogeneous antiferromagnet

Magnetic remanence---found in bar magnets or magnetic storage devices---is probably the oldest and most ubiquitous phenomenon underpinning the technological applications of magnetism. It is a macroscopic nonequilibrium phenomenon: A remanent magnetization appears when a magnetic field is applied to an initially unmagnetized ferromagnet, and then taken away. Here, we present an inverted magnetic hysteresis loop in the pyrochlore compound...