標題: GdFe0.8Ni0.2O3: A Multiferroic Material for Low-Power Spintronic Devices with High Storage Capacity
作者: Chang, Shu-Jui
Chung, Ming-Han
Kao, Ming-Yi
Lee, Shang-Fan
Yu, Yi-Hsing
Kaun, Chao-Cheng
Nakamura, Tetsuya
Sasabe, Norimasa
Chu, Shang-Jui
Tseng, Yuan-Chieh
交大名義發表
材料科學與工程學系
National Chiao Tung University
Department of Materials Science and Engineering
關鍵字: multiferroics;voltage-controlled magnetism;spintronics;perovskite;electric field control
公開日期: 28-Aug-2019
摘要: Multiferroic materials are strong candidates for reducing the energy consumption of voltage-controlled spintronic devices because of the coexistence of ferroelectric (FE) and magnetic orders in a single phase. In this article, we present a new multiferroic perovskite, GdNixFe1-xO3 (GFNO), produced via sputtering on a SrTiO3 substrate. The proposed GFNO is FE and canted antiferromagnetic (AFM) within a monoclinic framework at room temperature. The FE polarization of the GFNO is up to 37 mu C/cm(2). When capped with a Co layer, the resulting heterostructure exhibits voltage-controlled magnetism (VCM). The heterostructured device exhibits two distinct features. First, its VCM depends on the magnitude as well as the polarity of the applied bias, thereby doubling the number of available magnetic readout states under a fixed voltage. Furthermore, the magnetic order of the device can be controlled very effectively within +/- 1 V. These two characteristics satisfy the requirements for low-power and high-storage technology. Theoretical analysis and experimental results indicate the importance of Ni dopant in regulating the polarity-dependent multiferroicity of this gadolinium ferrite system.
URI: http://dx.doi.org/10.1021/acsami.9b11767
http://hdl.handle.net/11536/152865
ISSN: 1944-8244
DOI: 10.1021/acsami.9b11767
期刊: ACS APPLIED MATERIALS & INTERFACES
Volume: 11
Issue: 34
起始頁: 31562
結束頁: 31572
Appears in Collections:Articles