Tuning the formation and functionalities of ultrafine CoFe 2 O 4 nanocrystals via interfacial coherent strain

Ying Hui Hsieh, Ho Hung Kuo, Sheng Chieh Liao, Heng Jui Liu, Ying Jiun Chen, Hong Ji Lin, Chien Te Chen, Chih Huang Lai, Qian Zhan, Yu Lun Chueh, Ying-hao Chu*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

7 Scopus citations


Complex oxide nanocrystals with a spinel structure show their remarkable optical, electronic, mechanical, thermal, and magnetic properties. In this study, we present a simple yet versatile strategy to grow self-assembled epitaxial CoFe 2 O 4 nanocrystals with well-controlled size (less than 10 nm) and single orientation. CoFe 2 O 4 nanocrystals were fabricated via phase separation in a BiFeO 3 - CoF 2 O 4 ultrathin film by pulsed laser deposition. The coherent strain at the BiFeO 3 -CoF 2 O 4 interface suppressed the growth of the nanocrystals regardless of substrate temperatures. This strain also resulted in the ferromagnetic anisotropy and interesting conducting behaviors of ultrafine CFO nanocrystals.

Original languageEnglish
Pages (from-to)6219-6223
Number of pages5
Issue number14
StatePublished - 21 Jul 2013

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