Indirect exchange spring between FePt and Fe with a Ru interlayer

Jianhua Jiang, Nobuki Tezuka, K. Inomata

研究成果: Article査読

14 被引用数 (Scopus)


Indirect exchange spring in magnetron-sputtered FePt/Ru/Fe trilayers as well as multilayers have been investigated. Interlayer exchange coupling between FePt and Fe layers through a Ru spacer was obtained with an oscillation period of about 1 nm. Magnetic properties of FePt thin films with different nominal thicknesses deposited on MgO (1 1 0) substrates at 400 °C showed that 12.5 nm thick FePt film had both high coercivity and good squareness. In FePt/Ru/Fe trilayers, ferromagnetic coupling between the two magnetic layers was achieved with a 0.5 nm thick Ru layer, and the saturated magnetization was largely improved after using interlayer exchange coupling with Fe while the coercivity changed little, which indicated that indirect exchange spring was a promising approach for high-performance magnets. Multilayers with such structures had also been studied with different thickness ratio of the two magnetic layers and strong exchange coupling was achieved as Fe thickness ratio increased.

ジャーナルJournal of Magnetism and Magnetic Materials
出版ステータスPublished - 2006 7月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学


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