标题：Thermal conductivity in self-assembled CoFe2O4/BiFeO3 vertical nanocomposite films
作者：Zhang, Chen ;Huberman, Samuel C. ;Ning, Shuai ;Pelliciari, Jonathan ;Duncan, Ryan A. ;Liao, Bolin ;Ojha, Shuchi ;Freeland, John W. ;Nelson, Keith A. ; 更多 作者机构：[Zhang, Chen ;Ning, Shuai ;Ojha, Shuchi ;Ross, Caroline A. ] Department of Materials Science and Engineering, Massachusetts Institute of Technology, C 更多
通讯作者：Ross, Caroline A
来源：Applied Physics Letters
摘要：The thermal conductivity of self-assembled nanocomposite oxide films consisting of cobalt ferrite (CFO) spinel pillars grown within a single-crystal bismuth ferrite (BFO) perovskite matrix is described as a function of the volume fraction of the spinel. Single phase BFO and CFO had cross-plane thermal conductivities of 1.32 W m-1 K-1 and 3.94 W m-1 K-1, respectively, and the thermal conductivity of the nanocomposites increased with the CFO volume fraction within this range. A small increase (∼5%) in thermal conductivity for the pure CFO phase in the AC-demagnetized state was observed, suggesting possible magnon contributions. Steady state gray-medium based variance-reduced Monte Carlo simulations show consistent trends with experimental data on the dependence of thermal conductivity with the CFO volume fraction.
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