Preparing magnetic yttrium iron garnet nanodot arrays by ultrathin anodic alumina template on silicon substrate
- National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054 (China)
- Institute of Electron Device and Application, Hangzhou Dianzi University, Hangzhou 310008 (China)
- Magnetism Key Laboratory of Zhejiang Province, China Jiliang University, Hangzhou 310018 (China)
Ultrahigh density periodically ordered magnetic yttrium iron garnet (Y{sub 3}Fe{sub 5}O{sub 12}, YIG) nanodot arrays have been prepared by pulsed laser deposition through an ultrathin alumina mask (UTAM). UTAM having periodically ordered circularly shaped holes with 350 nm in diameter, 450 nm in inter-pore distance, and 700 nm in height has been prepared on silicon substrate. Furthermore, the microstructure and magnetic properties of YIG nanodot arrays have been characterized. Nanodot arrays with a sharp distribution in diameter centered at 340 nm with standard deviation of 10 nm have been fabricated. Moreover, typical hysteresis loops and ferromagnetic resonance spectra in in-plane and out-of-plane revealed that this unique structure greatly influences the magnetics properties of YIG. First, coercivity of YIG nanodot arrays in in-plane was increased about from 15 Oe of YIG films to 500 Oe. Then, the degree of uniformity about nanodot height decided that two or more resonance peaks in out-of-plane were detected in the spectra. The peak-to-peak linewidth values were about 94 Oe and 40 Oe in the parallel and perpendicular directions, respectively, which indicated that the values were larger by the two-magnon scattering. Consequently, this pattering method creates opportunities for studying physics in oxide nanomagnets and may be applied in spin-wave devices.
- OSTI ID:
- 22492698
- Journal Information:
- Applied Physics Letters, Vol. 107, Issue 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM OXIDES
COERCIVE FORCE
ENERGY BEAM DEPOSITION
FERRITE GARNETS
FERROMAGNETIC RESONANCE
FILMS
HOLES
HYSTERESIS
IRON OXIDES
LASER RADIATION
MAGNETIC PROPERTIES
MICROSTRUCTURE
PERIODICITY
PULSED IRRADIATION
QUANTUM DOTS
SCATTERING
SILICON
SPECTRA
SPIN WAVES
YTTRIUM COMPOUNDS