MgO layer thickness dependence of structure and magnetic properties of L1 0-FePt/MgO/GaAs structures

Rento Ohsugi, Makoto Kohda, Takeshi Seki, Akihiko Ohtsu, Masaki Mizuguchi, Koki Takanashi, Junsaku Nitta

研究成果: Article

6 被引用数 (Scopus)

抄録

We investigated the MgO layer thickness dependences of the structure and magnetic properties of L1 0-FePt/MgO/GaAs structures. To examine how the crystallinity and growth morphology of the MgO layer affect the L1 0-FePt layer, two kinds of preparation method were employed for MgO deposition: electron beam (EB) evaporation and sputter deposition. The MgO layer deposited by EB evaporation included a large strain because of the cube-on-cube epitaxial relationship despite a large lattice mismatch between MgO and GaAs. For the MgO layer prepared by sputtering, on the other hand, an amorphous MgO layer was initially grown on the GaAs substrate. Subsequently, a crystalline MgO layer was grown in the (001) direction. In the case of the EB-deposited MgO, as the MgO layer thickness increased, the degree of chemical order of the L1 0-FePt layer increased from 55 to 81% owing to the improvement of the crystallinity of the MgO layer. The improvement of chemical order also led to the increase in the remanent magnetization of L1 0-FePt from 84 to 98%.

本文言語English
論文番号02BM05
ジャーナルJapanese journal of applied physics
51
2 PART 2
DOI
出版ステータスPublished - 2012 2 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

フィンガープリント 「MgO layer thickness dependence of structure and magnetic properties of L1 <sub>0</sub>-FePt/MgO/GaAs structures」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル