Ferroelectric and magnetic properties in ε-Fe2O3 epitaxial film

被引：4

作者：

Hamasaki, Yosuke ^{[1
]}

Yasui, Shintaro ^{[2
,3
]}

Katayama, Tsukasa ^{[4
]}

Kiguchi, Takanori ^{[5
]}

Sawai, Shinya ^{[1
]}

Itoh, Mitsuru ^{[2
,6
]}

机构：

[1] Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan

[2] Tokyo Inst Technol, Lab Mat & Struct, Midori Ku, 4259-J2-19,Nagatsuta Cho, Yokohama, Kanagawa 2268503, Japan

[3] Tokyo Inst Technol, Lab Zerocarbon Energy, Meguro Ku, 2-12-1,Ookayama, Tokyo 1528550, Japan

[4] Hokaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010020, Japan

[5] Tohoku Univ, Inst Mat Res, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

[6] Natl Inst Adv Ind Sci & Technol, Res Inst Adv Elect & Photon RIAEP, Cent-2,1-1-1 Umezono, Tsukuba, Ibaraki 3058568, Japan

来源：

APPLIED PHYSICS LETTERS | 2021年 / 119卷 / 18期

关键词：

THIN-FILMS; CRYSTAL; OXIDES; PHASE;

D O I：

10.1063/5.0063021

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The phase stability, ferroelectricity, and magnetism of highly crystalline epitaxial epsilon-Fe2O3 films deposited on SrTiO3(111) substrates are reported. Temperature-dependent x-ray diffraction measurements revealed that alpha-Fe2O3 appeared as a secondary phase after samples were annealed up to 1000 & DEG;C. A clear saturated and opened polarization-electric field hysteresis loop with the remnant polarization & SIM;2.6 mu C cm(-2) and coercive electric field & SIM;100 kV cm(-1) was obtained at room temperature using a conventional ferroelectric measurement technique. The magnetic phase transition was observed at 155 K. Magnetization-magnetic field measurements revealed that magnetic softening via the phase transition accompanied a reduction in the coercive field from 10 to 6.8 kOe, which is smaller than the coercive field reduction previously observed for epsilon-Fe2O3 nanoparticles.</p>

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页数：6

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