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Quasi-Hexagonal Ordered Arrays of FePt Nanoparticles Prepared by a Micellar Method |
| QU Sheng;ZHANG Xing-Wang;YIN Zhi-Gang;YOU Jing-Bi;CHEN Nuo-Fu |
| Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 |
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| Cite this article: |
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QU Sheng, ZHANG Xing-Wang, YIN Zhi-Gang et al 2007 Chin. Phys. Lett. 24 3520-3523 |
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Abstract Hexagonally ordered arrays of magnetic FePt nanoparticles on Si substrates are prepared by a self assembly of diblock copolymer PS-b-P2VP in toluene, a dip coating process and finally plasma treatment. The as-treated FePt nanoparticles are covered by an oxide layer that can be removed by a 40Ar+ sputtering. The effects of the sequence of adding salts on the composition distribution are revealed by x-ray photoelectron spectroscopy measurements. No particle agglomeration is observed after 600°C annealing for the present
ordered array of FePt nanoparticles, which exhibits advantages in patterning FePt nanoparticles by a micellar method. Moreover, magnetic properties of the annealed FePt nanoparticles at room temperature are investigated by a vibrating sample magnetometer.
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| Keywords:
75.50.Bb
81.05.Bx
81.07.-b
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Received: 26 August 2007
Published: 03 December 2007
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| PACS: |
75.50.Bb
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(Fe and its alloys)
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81.05.Bx
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(Metals, semimetals, and alloys)
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81.07.-b
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(Nanoscale materials and structures: fabrication and characterization)
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