This work was performed as part of the Information Storage Industry Consortium (INSIC) program in Heat Assisted Magnetic Recording (HAMR), with the support of the U.S. Department of Commerce, National Institute of Standards and Technology, Advanced Technology Program, Cooperative Agreement no. 70NANB1H3056. Partial financial support from Heraeus Corp. is acknowledged. We thank Professor C. Leighton for SQUID usage, Dr. S. McKernan for his help with TEM analysis, and Dr. J. Bai and Y.-H. Xu for fruitful discussion. The integrated nanoparticle deposition system used in this work was set up through J.-P.W.'s faculty startup fund from the University of Minnesota. Supporting Information is available online from Wiley InterScience or from the author.
Tuning the Crystal Structure and Magnetic Properties of FePt Nanomagnets†
Article first published online: 6 JUN 2007
Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 19, Issue 13, pages 1703–1706, July, 2007
How to Cite
Qiu, J.-M. and Wang, J.-P. (2007), Tuning the Crystal Structure and Magnetic Properties of FePt Nanomagnets. Adv. Mater., 19: 1703–1706. doi: 10.1002/adma.200602374
- Issue published online: 26 JUN 2007
- Article first published online: 6 JUN 2007
- Manuscript Revised: 21 DEC 2006
- Manuscript Received: 18 OCT 2006
- U.S. Department of Commerce, National Institute of Standards and Technology, Advanced Technology Program. Grant Number: Cooperative Agreement no. 70NANB1H3056
- Heraeus Corp.
- Ferromagnetic materials;
- Nanoparticles, magnetic;
- Structure–property relationships
Structure tuning of FePt nanomagnets is achieved by using a gas-phase condensation technique (see figure). Three types of FePt nanomagnets, A1 phase icosahedron, A1 phase octahedron, and L10 phase octahedron, with uniform size distributions are produced by directly manipulating the thermal environments for the nucleation and growth. The different magnetic performances of these nanomagnets are consistent with their structure variances.