title: Tuning the formation and functionalities of ultrafine CoFe2O4 nanocrystals via interfacial coherent strain.
abstract: 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 CoFe2O4 nanocrystals with well-controlled size (less than 10 nm) and single orientation. CoFe2O4 nanocrystals were fabricated via phase separation in a BiFeO3-CoF2O4 ultrathin film by pulsed laser deposition. The coherent strain at the BiFeO3-CoF2O4 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.
authors.affiliation: Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Ying-Hui
authors.initials: YH
authors.lastname: Hsieh
authors.forename: Ho-Hung
authors.initials: HH
authors.lastname: Kuo
authors.forename: Sheng-Chieh
authors.initials: SC
authors.lastname: Liao
authors.forename: Heng-Jui
authors.initials: HJ
authors.lastname: Liu
authors.forename: Ying-Jiun
authors.initials: YJ
authors.lastname: Chen
authors.forename: Hong-Ji
authors.initials: HJ
authors.lastname: Lin
authors.forename: Chien-Te
authors.initials: CT
authors.lastname: Chen
authors.forename: Chih-Huang
authors.initials: CH
authors.lastname: Lai
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhan
authors.forename: Yu-Lun
authors.initials: YL
authors.lastname: Chueh
authors.forename: Ying-Hao
authors.initials: YH
authors.lastname: Chu