Using neutron scattering and voltage measurements, a group of researchers have discovered that a material's magnetic properties can predict spin current changes with temperature. The finding is a major breakthrough in the field of spintronics.
Using neutron scattering and voltage measurements, a group of researchers have discovered that a material's magnetic properties can predict spin current changes with temperature. The finding is a major breakthrough in the field of spintronics.
Detecting spin currents is no easy feat. It requires the use of macroscopic voltage measurement, which looks at the overall voltage changes across a material. However, a common stumbling block has been a lack of understanding into how this spin current actually moves or propagates within the material itself.
Furthermore, the material studied displayed magnetic behaviors with distinct gap energies. This suggests that below the temperature linked to this gap energy, spin current carriers are absent, leading to the observed decrease in the spin current signal at lower temperatures. Remarkably, the spin current's temperature dependence follows an exponential decay, mirroring the neutron scattering results.
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