Current-driven magnetization reversal in a ferromagnetic semiconductor (Ga, Mn)As/GaAs/(Ga, Mn)As tunnel junction

D. Chiba, Y. Sato, Tomohiro Kita, F. Matsukura, H. Ohno

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Abstract

The current-driven magnetization reversal was demonstrated in a ferromagnetic semiconductor based (Ga,Mn)As/GaAs/(Ga,Mn)As magnetic tunnel junction at 30K. It was observed that magnetization switching occurred at low critical current densities of 1.1-2.2 ×105 A/cm2. It was found that the magnetization reversal was due to the spin-transfer torque exerted from the spin-polarized current. It was also found that current-induced reversal was advantageous for ultrahigh density magnetic memories over magnetization reversal using magnetic fields.

Original languageEnglish
Article number216602
JournalPhysical Review Letters
Volume93
Issue number21
DOIs
Publication statusPublished - 2004 Nov 19
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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