Enhanced magneto-optical effect in Y1.5Ce1.5Fe5O12 thin films deposited on silicon by pulsed laser deposition

被引：41

作者：

Zhang, Y. ^{[1
,2
,3
]}

Wang, C. T. ^{[1
,2
,3
]}

Liang, X. ^{[1
,2
,3
]}

Peng, B. ^{[1
,2
,3
]}

Lu, H. P. ^{[1
,2
,3
]}

Zhou, P. H. ^{[1
,2
,3
]}

Zhang, L. ^{[1
,2
,3
]}

Xie, J. X. ^{[1
,2
,3
]}

Deng, L. J. ^{[1
,2
,3
]}

Zahradnik, M. ^{[4
]}

Beran, L. ^{[4
]}

Kucera, M. ^{[4
]}

Veis, M. ^{[4
]}

Ross, C. A. ^{[5
]}

Bi, L. ^{[1
,2
,3
]}

机构：

[1] Univ Elect Sci & Technol China, Natl Engn Res Ctr Electromagnet Radiat Control Ma, Chengdu 610054, Peoples R China

[2] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

[3] Univ Elect Sci & Technol China, Minist Educ, Key Lab Multispectral Absorbing Mat & Struct, Chengdu 610054, Peoples R China

[4] Charles Univ Prague, Ke Karlovu 5, Prague 12116, Czech Republic

[5] MIT, Dept Mat & Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 703卷

基金：

中国国家自然科学基金; 国家教育部博士点专项基金资助;

关键词：

Magnetooptics; Ce:YIG; Magnetic oxides; Thin films; Pulsed laser deposition; Silicon photonics; YTTRIUM-IRON-GARNET; SPECTROSCOPY; XPS; YIG;

D O I：

10.1016/j.jallcom.2017.01.315

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polycrystalline Ce: YIG thin films deposited on silicon are promising material candidates for integrated nonreciprocal photonic devices. So far, the reported Faraday rotation of polycrystalline Ce: YIG thin films on silicon is much lower than that of their single crystal or epitaxial thin film counterparts, limiting the magneto-optical figure of merit, device bandwidth and fabrication tolerance. In this paper, we report the growth of Ce: YIG thin films on silicon from targets with high Ce concentration up to nominally Y1.5Ce1.5Fe5O12 by pulsed laser deposition. The polycrystalline Y1.5Ce1.5Fe5O12 thin film showed pure garnet phase, smooth surface roughness of 0.7 nm, a dominant Ce(3+)valence state and a bulk-like saturation magnetization of 125 emu/cm(3) at room temperature. This material shows high Faraday rotation of-6410 deg/cm at 1550 nmwavelength, exceeding that of an Y2Ce1Fe5O12 epitaxial thin film on a GGG (100) substrate. However higher loss and lower figure of merit is also observed at 1550 nm wavelength compared to Y2Ce1Fe5O12 thin films, possibly due to the low oxygen partial pressure during fabrication. Low deposition oxygen partial pressure is essential to enhance the Ce solubility and Ce3+ concentration, which results in large Faraday rotation. (C) 2017 Elsevier B. V. All rights reserved.

引用

页码：591 / 599

页数：9

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