Control of magnetization reversal and ferroelectric/ferromagnetic properties with electric field applied in a hetero epitaxial film

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420295
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: Nihon University
• Principal Investigator: IWATA Nobuyuki 日本大学, 理工学部, 准教授 (20328686)
• Co-Investigator(Kenkyū-buntansha): YAMAMOTO Hiroshi 日本大学, 理工学部, 教授 (90130632) ; HASHIMOTO Takuya 日本大学, 文理学部, 教授 (20212136) ; TAKASE Kouichi 日本大学, 理工学部, 教授 (10297781)
• Co-Investigator(Renkei-kenkyūsha): TSUKAMOTO Arata 日本大学, 理工学部, 教授 (30318365)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 電気磁気効果 / マルチフェロイック / 酸化物積層膜 / スパッタ法 / パルスレーザー堆積法 / ヘテロ界面 / 電界印加型磁気特性制御 / 新規物質設計

Outline of Final Research Achievements

The purpose of this research is to control and/or reverse the magnetization with electric field applied. In the [Pt/Co]Pt//r-oriented Cr2O3 multilayer, large exchange bias field (HEB) is observed. The HEB reverses after magnetoelectric field cooling changing the direction of magnetic field from plus to minus. In the [BiMO3/CaBO3(M=Mn, Fe、B=Fe, Mn) superlattices, high quality films are synthesized by pulsed laser deposition method using highly dense targets prepared by Pechini method. The superlattices are weak ferromagnetic materials althogh the used materials are antiferromagnetic. The origin of the ferromagnetic coupling is identified at the interface of the superlatttices. These results are quite important achievement to lead to the magnetization reversal with electric field applied.

Free Research Field

電気電子材料、スパッタ法やPLD法、CVD法を用いた特殊な多機能性薄膜作製