Ferromagnetism in two-dimensional Ti0.8Co0.2O2 nanosheets

被引：84
|
作者：
Osada, M [1 ]
Ebina, Y
Fukuda, K
Ono, K
Takada, K
Yamaura, K
Takayama-Muromachi, E
Sasaki, T
机构：
[1] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan
[2] High Energy Accelerator Res Org, KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
[3] Natl Inst Mat Sci, Superconducting Mat Ctr, Tsukuba, Ibaraki 3050044, Japan
[4] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan
来源：
PHYSICAL REVIEW B | 2006年 / 73卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.73.153301
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have investigated magnetic and magneto-optical properties of two-dimensional (2D) Ti0.8Co0.2O2 nanosheet, a new nanosized titanium oxide derived from layered titanates by exfoliation. Despite heavy doped 2D system in the dielectric ground, the multilayer films of Ti0.8Co0.2O2 nanosheets exhibit room-temperature ferromagnetism with magnetic moment of 1.4 mu(B)/Co. We also observe robust magnetic circular dichroism near the absorption edge at 4 eV, indicating a strong spin polarization in this 2D system. The first-principles study of Ti0.8Co0.2O2 nanosheet characterizes the ferromagnetic state with a spin-orbit-induced anisotropy.
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页数：4
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