Enhanced Structural and Magnetic Coupling in a Mesocrystal-Assisted Nanocomposite

Yuanmin Zhu, Qian Zhan, Jan-Chi Yang, Yugandhar Bitla, Pingping Liu, Chen I. Li, Heng Jui Liu, V. Suresh Kumar, Elke Arenholz, Qing He, Ying Hao Chu

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Benefiting from the advances made in well-controlled materials synthesis techniques, nanocomposites have drawn considerable attention due to their enthralling physics and functionalities. In this work, we report a new heteroepitaxial mesocrystal-perovskite nanocomposite, (NiFe2O4)0.33:(La0.67Ca0.33MnO3)0.67. Elaborate structural studies revealed that tiny NiFe2O4 nanocrystals aggregate into ordered octahedral mesocrystal arrays with {111} facets together with a concomitant structural phase transition of the La0.67Ca0.33MnO3 matrix upon postannealing process. Combined magnetic and X-ray absorption spectroscopic measurements show significant enhancement in the magnetic properties at room temperature due to the structural evolution of magnetic NiFe2O4 and the consequent magnetic coupling at the heterointerfaces mediating via well connected octahedrons of Mn-O6 in La0.67Ca0.33MnO3 and (Ni,Fe)-O6 in NiFe2O4. This work demonstrates an approach to manipulate the exciting physical properties of material systems by integrating desired functionalities of the constituents via synthesis of a self-assembled mesocrystal embedded nanocomposite system.

Original languageEnglish
Pages (from-to)1104-1111
Number of pages8
JournalACS Applied Materials and Interfaces
Volume8
Issue number2
DOIs
Publication statusPublished - 2016 Jan 20

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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    Zhu, Y., Zhan, Q., Yang, J-C., Bitla, Y., Liu, P., Li, C. I., Liu, H. J., Kumar, V. S., Arenholz, E., He, Q., & Chu, Y. H. (2016). Enhanced Structural and Magnetic Coupling in a Mesocrystal-Assisted Nanocomposite. ACS Applied Materials and Interfaces, 8(2), 1104-1111. https://doi.org/10.1021/acsami.5b08026