Large tunnel magnetoresistance in a fully epitaxial double-barrier magnetic tunnel junction of Fe/MgO/Fe/γ-Al2O3/Nb-doped SrTiO3
We report large tunnel magnetoresistance (TMR) ratios of up to 219% at 300 K and 366% at 3.7 K obtained for a high-quality fully epitaxial double-barrier magnetic tunnel junction (MTJ) composed of Fe/MgO/Fe/γ-Al2O3/Nb-doped SrTiO3. The obtained TMR ratios are among the highest values reported in Fe/...
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| Veröffentlicht in: | AIP advances 2020-08, Vol.10 (8), p.085115-085115-5 |
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| container_end_page | 085115-5 |
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| container_issue | 8 |
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| container_title | AIP advances |
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| creator | Suzuki, Ryota Tadano, Yuriko Tanaka, Masaaki Ohya, Shinobu |
| description | We report large tunnel magnetoresistance (TMR) ratios of up to 219% at 300 K and 366% at 3.7 K obtained for a high-quality fully epitaxial double-barrier magnetic tunnel junction (MTJ) composed of Fe/MgO/Fe/γ-Al2O3/Nb-doped SrTiO3. The obtained TMR ratios are among the highest values reported in Fe/MgO/Fe structures. This result may be attributed to the small in-plane wave vectors of the tunneling electrons injected from the Nb-doped SrTiO3 electrode with a small carrier density, demonstrating good compatibility between the Fe-based MTJ and SrTiO3. |
| doi_str_mv | 10.1063/5.0002536 |
| format | Article |
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The obtained TMR ratios are among the highest values reported in Fe/MgO/Fe structures. 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| issn | 2158-3226 2158-3226 |
| language | eng |
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| source | DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | Aluminum oxide Carrier density Magnesium oxide Magnetoresistivity Niobium Plane waves Strontium titanates Transitional aluminas Tunnel junctions Tunnel magnetoresistance |
| title | Large tunnel magnetoresistance in a fully epitaxial double-barrier magnetic tunnel junction of Fe/MgO/Fe/γ-Al2O3/Nb-doped SrTiO3 |
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