Magnetic nanocheckerboards with tunable sizes in the Mn-doped CoFe 2O4 spinel

C. L. Zhang, C. M. Tseng, C. H. Chen, S. Yeo, Y. J. Choi, S. W. Cheong

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27 Citations (Scopus)


Formation of magnetically ordered array of two types of rectangular nanorods, ∼300 nm in length and a few nanometers in size, is achieved in the Mn-doped Co Fe2 O4 spinel through chemical phase separation mediated by cooperative Jahn-Teller distortions. At room temperature, the magnetic nanorods, with composition close to Co Fe2 O4, interlace with the paramagnetic counterparts and form a highly organized checkerboard pattern in the cross section. The checkerboard size in the range of ∼13.8×7.9-∼17. 3×14.0 nm2 is tunable with composition and, particularly, with the isothermal annealing time. These three-dimensional nanocheckerboards exhibit a nearly ideal configuration for the patterned perpendicular recording medium.

Original languageEnglish
Article number233110
JournalApplied Physics Letters
Issue number23
Publication statusPublished - 2007

Bibliographical note

Funding Information:
We thank the useful discussion with Dr. Y. Ni, a postdoctoral fellowship from the Department of Materials Science and Engineering, Rutgers University. The research was supported by the National Science Council, Taiwan, under the Contract Nos. NSC95-2752-M-002-006-PAE (National Taiwan University) and NSF-DMR-0405682 (Rutgers).

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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