Gate tuning of anomalous Hall effect in ferromagnetic metal SrRuO3
The electric field effect on ferromagnetism offers a new dimension in the recent advancement of spintronics. We report on the gate control of transport properties in thin films of oxide-based ferromagnetic metal, SrRuO3. An electric double layer transistor configuration was utilized with an ionic li...
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Veröffentlicht in: | Applied physics letters 2014-10, Vol.105 (16) |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The electric field effect on ferromagnetism offers a new dimension in the recent advancement of spintronics. We report on the gate control of transport properties in thin films of oxide-based ferromagnetic metal, SrRuO3. An electric double layer transistor configuration was utilized with an ionic liquid dielectric to apply a strong electric field on a SrRuO3 thin film of 5 monolayers in thickness. The application of gate voltage induced a clear electroresistance effect, despite a considerably-large initial carrier density of the order of 1022 cm−3. Furthermore, we found that the gate modulation of the anomalous Hall conductivity σxy, which was as large as ∼±40% at low temperatures, was about three times larger than that of the longitudinal conductivity σxx. The variation of σxy is characterized by the power-law scaling relation with σxx, which is widely observed in a bad metal regime of the charge transport. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.4899145 |