期刊
CERAMICS INTERNATIONAL
卷 44, 期 7, 页码 8155-8160出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.01.262
关键词
BaTiO3; Ni; Nanocrystals; Interparticle spacing; Dipolar; Magnetic anisotropy
资金
- Longshan academic talent research supporting program of SWUST [17LZX538]
- achievements of scientific research funds of SWUST of China [15zx7140]
A quasi-periodic superlattice was designed, consisting of the epitaxial BaTiO3 single crystal matrix and the Ni nanocrystals (NCs). For the in-plane Ni NCs the statistical interparticle spacing (R) with a log-normal distribution was controlled ranging from 9 to 28 nm. With the decrease of R, the preferential orientation of the Ni NCs was changed from (001) to (111), inducing the transition of magnetic anisotropy from the out-of-plane to the in plane direction. Increasing the in-plane R modulated the collective magnetic behavior by effectively lowering the interparticle dipolar coupling. For the Ni NCs/BaTiO3 system, it displayed a noninteracting system in the out-ofplane, and possesses an in-plane tunability between the interacting (R < 21 nm) and noninteracting (R >= 21 nm) system according to change the R. The increase of in-plane anisotropy energy induced the enhancement of dipole-dipole interaction among the Ni NCs.
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