Temperature dependence of exchange coupling in Mn75Ir 25/Co70Fe30/AlOx/Co 70Fe30/Ni80Fe20 MTJs

Y. K. Hu, S. M. Yoon, J. J. Lim, V. K. Sankaranarayanan, C. G. Kim, C. O. Kim, M. Tsunoda, Migaku Takahashi

研究成果: Article

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Magnetic Tunnel Junctions (MTJs) were fabricated on thermally oxidized Si(100) wafers by utilizing DC magnetron sputtering. Magnetic properties of MTJs with structure of Ta(50)/Cu(100)/Ta(50)/Ni80Fe20(20)/ Cu(50)/Mn75Ir25(100)/Co70Fe30(25)/ AlOx(15)/Co70Fe30(25)/Ni80Fe 20(t)/Ta(50), where t = 0, 100 and 100 Å, were investigated by using SQUID, XRD and MR analyzer. Exchange bias field is inversely proportional to temperature for t = 0 Å sample. XRD shows the improvement of (111) texture of IrMn3 and Cu after annealing. The exchange bias field decreases with increasing temperature due to thermal effect. And it is the highest for t = 100 Å due to increased crystallites size of IrMn 3. For the free layer, the temperature dependence of interlayer exchange coupling involves the same mechanism as that of exchange bias.

元の言語English
ページ(範囲)1700-1703
ページ数4
ジャーナルPhysica Status Solidi (A) Applied Research
201
発行部数8
DOI
出版物ステータスPublished - 2004 6 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

フィンガープリント Temperature dependence of exchange coupling in Mn<sub>75</sub>Ir <sub>25</sub>/Co<sub>70</sub>Fe<sub>30</sub>/AlO<sub>x</sub>/Co <sub>70</sub>Fe<sub>30</sub>/Ni<sub>80</sub>Fe<sub>20</sub> MTJs' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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    Hu, Y. K., Yoon, S. M., Lim, J. J., Sankaranarayanan, V. K., Kim, C. G., Kim, C. O., Tsunoda, M., & Takahashi, M. (2004). Temperature dependence of exchange coupling in Mn75Ir 25/Co70Fe30/AlOx/Co 70Fe30/Ni80Fe20 MTJs. Physica Status Solidi (A) Applied Research, 201(8), 1700-1703. https://doi.org/10.1002/pssa.200304651