Magnetic Mesocrystal-Assisted Magnetoresistance in Manganite

• Published in: Nano letters Vol. 14; no. 11; pp. 6073 - 6079
• Main Authors: Yang, Jan-Chi, He, Qing, Zhu, Yuan-Min, Lin, Jheng-Cyuan, Liu, Heng-Jui, Hsieh, Ying-Hui, Wu, Ping-Chun, Chen, Yen-Lin, Lee, Shang-Fan, Chin, Yi-Ying, Lin, Hong-Ji, Chen, Chien-Te, Zhan, Qian, Arenholz, Elke, Chu, Ying-Hao
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 12.11.2014
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Crystals; Design engineering; Exact sciences and technology; Magnetic properties and materials; Magnetic properties of nanostructures; Magnetoresistance; Magnetoresistivity; Manganites; Materials science; Methods of nanofabrication; Nanocomposites; Nanocrystalline materials; Nanocrystals; Nanoscale materials and structures: fabrication and characterization; Oxides; Physics; Self-assembly; mesocrystal; nanocrystal; nanocomposite; colossal magnetoresistance; complex oxide; self-assembled; Self-assembly; Monocrystals; Nanocomposites; Polarized spin; Doping; Polycrystals; Magnetoresistance
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl5019172

Mesocrystal, a new class of crystals as compared to conventional and well-known single crystals and polycrystalline systems, has captured significant attention in the past decade. Recent studies have been focused on the advance of synthesis mechanisms as well as the potential on device applications. In order to create further opportunities upon functional mesocrystals, we fabricated a self-assembled nanocomposite composed of magnetic CoFe2O4 mesocrystal in Sr-doped manganites. This combination exhibits intriguing structural and magnetic tunabilities. Furthermore, the antiferromagnetic coupling of the mesocrystal and matrix has induced an additional magnetic perturbation to spin-polarized electrons, resulting in a significantly enhanced magnetoresistance in the nanocomposite. Our work demonstrates a new thought toward the enhancement of intrinsic functionalities assisted by mesocrystals and advanced design of novel mesocrystal-embedded nanocomposites.