Spin torque control of antiferromagnetic moments in NiO
| Autor: | Takuo Ohkochi, Takahiro Moriyama, Teruo Ono, Motoi Kimata, Kent Oda |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Multidisciplinary Condensed matter physics Magnetic moment Magnetoresistance Spintronics lcsh:R Magnetic devices lcsh:Medicine 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic susceptibility Magnetic field Ferromagnetism Magnetic properties and materials 0103 physical sciences Antiferromagnetism lcsh:Q Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology lcsh:Science Spin-½ |
| Zdroj: | Scientific Reports, Vol 8, Iss 1, Pp 1-6 (2018) |
| ISSN: | 2045-2322 |
| Popis: | For a long time, there were no efficient ways of controlling antiferromagnets. Quite a strong magnetic field was required to manipulate the magnetic moments because of a high molecular field and a small magnetic susceptibility. It was also difficult to detect the orientation of the magnetic moments since the net magnetic moment is effectively zero. For these reasons, research on antiferromagnets has not been progressed as drastically as that on ferromagnets which are the main materials in modern spintronic devices. Here we show that the magnetic moments in NiO, a typical natural antiferromagnet, can indeed be controlled by the spin torque with a relatively small electric current density (~4 × 107 A/cm2) and their orientation is detected by the transverse resistance resulting from the spin Hall magnetoresistance. The demonstrated techniques of controlling and detecting antiferromagnets would outstandingly promote the methodologies in the recently emerged “antiferromagnetic spintronics”. Furthermore, our results essentially lead to a spin torque antiferromagnetic memory. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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