Zhu explained one version of this phenomenon using a scanning tunneling microscope inside an electron microscope, noting that polarons can transition between liquid and solid states – that effect was originally discovered by von Helmolt in perovskites. An anisotropic version of this phenomenon is used in "barber pole" electronic compasses, while another version can be improved by using spin valves in alternating layers to cut back on RKKY couplin
Zhu explained one version of this phenomenon using a scanning tunneling microscope inside an electron microscope, noting that polarons can transition between liquid and solid states – that effect was originally discovered by von Helmolt in perovskites. An anisotropic version of this phenomenon is used in "barber pole" electronic compasses, while another version can be improved by using spin valves in alternating layers to cut back on RKKY coupling. A version of this phenomenon occurs due to a decrease in scattering by breaking weak antiferromagnetic coupling between adjacent ferromagnetic layers, and is used in MRAM. Coming in a "Colossal" and "Tunneling" forms, for 10 points, name this effect, the "giant" variety of which is used in hard drive read heads and was characterized by Fert and Grunberg, the decrease in resistivity of a material with an applied magnetic field.
Zhu explained one version of this phenomenon using a scanning tunneling microscope inside an electron microscope, noting that polarons can transition between liquid and solid states – that effect was originally discovered by von Helmolt in perovskites.
{Magnetoresistance} (Accept “giant magnetoresistance”, “colossal magnetoresistance”, “anomalous magnetoresistance”, etc)