Enhanced Magneto-optic Kerr Effect and Magnetic Properties of CeY2Fe5O12 Epitaxial Thin Films
Enhanced Magneto-optic Kerr Effect and Magnetic Properties of CeY2Fe5O12 Epitaxial Thin Films
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DOI：
10.1103/physrevapplied.4.014008
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发表时间：
2015-07-20
影响因子：
4.6
通讯作者：
Klaeui, Mathias
中科院分区：
文献类型：
--
作者：
Kehlberger, Andreas;Richter, Kornel;Klaeui, Mathias
测定了通过脉冲激光沉积在钆镓石榴石基底上生长的外延 CeY2Fe5O12 (Ce:YIG) 和 Y3Fe5O12（钇铁石榴石或 YIG）薄膜的磁性和磁光性质。众所周知，Ce 取代到钇铁石榴石晶格中会产生增强的法拉第效应，在这里我们描述了磁光克尔效应，以及 Ce 取代产生的磁滞和铁磁共振响应。 X 射线衍射分析表明 Ce:YIG 薄膜具有较高的晶体学质量。对两种不同波长的磁光克尔效应的测量表明，与 YIG 相比，Ce:YIG 的克尔旋转增加了十倍。与 YIG 相比，Ce:YIG 具有稍大的磁矩、增加的磁阻尼和更高的磁各向异性，且取决于晶体取向。通过在 YIG 中特定的铈替代，我们的结果表明，根据磁光活性自旋电子器件的要求，大克尔效应和定制磁各向异性的设计成为可能。
The magnetic and magneto-optic properties of epitaxial CeY2Fe5O12 (Ce:YIG) and Y3Fe5O12 (yttrium iron garnet or YIG) thin films grown by pulsed laser deposition on gadolinium gallium garnet substrates are determined. An enhanced Faraday effect is known to result from Ce substitution into the yttrium iron garnet lattice, and here we characterize the magneto-optic Kerr effect, as well as the magnetic hysteresis and ferromagnetic resonance response that result from the Ce substitution. X-ray diffraction analysis reveals a high crystallographic quality for the Ce:YIG films. Measurements of the magneto-optic Kerr effect for two different wavelengths demonstrate that the Ce:YIG exhibits an up-to-tenfold increase in Kerr rotation compared to YIG. The Ce:YIG has a slightly larger magnetic moment, as well as increased magnetic damping and higher magnetic anisotropy compared to YIG with a dependence on the crystalline orientation. By specific cerium substitution in YIG, our results show that the engineering of a large Kerr effect and tailored magnetic anisotropy becomes possible as required for magneto-optically active spintronic devices.