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

doi:10.1021/acsami.5b08026

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

11 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:(La_0.67Ca_0.33MnO₃)_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 La_0.67Ca_0.33MnO₃ 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 La_0.67Ca_0.33MnO₃ 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 language	English
Pages (from-to)	1104-1111
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	8
Issue number	2
DOIs	https://doi.org/10.1021/acsami.5b08026
Publication status	Published - 2016 Jan 20

All Science Journal Classification (ASJC) codes

General Materials Science

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10.1021/acsami.5b08026

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title = "Enhanced Structural and Magnetic Coupling in a Mesocrystal-Assisted Nanocomposite",

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.",

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

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AU - Zhu, Yuanmin

AU - Zhan, Qian

AU - Yang, Jan Chi

AU - Bitla, Yugandhar

AU - Liu, Pingping

AU - Li, Chen I.

AU - Liu, Heng Jui

AU - Kumar, V. Suresh

AU - Arenholz, Elke

AU - He, Qing

AU - Chu, Ying Hao

PY - 2016/1/20

Y1 - 2016/1/20

N2 - 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.

AB - 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.

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Enhanced Structural and Magnetic Coupling in a Mesocrystal-Assisted Nanocomposite

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