title: Crossover between superconductivity and magnetism in SrRuO3mesocrystal embedded YBa2Cu3O7-xheterostructures.
abstract: The competition between superconductivity and ferromagnetism poses great challenges and has attracted renewed interest for applications in novel spintronic devices. In order to emphasize their interactions, we fabricated a heterostructure composed of superconducting YBa2Cu3O7-δ(YBCO) film embedded with itinerant ferromagnetic SrRuO3(SRO) mesocrystals. Starting from a doping concentration of 10 vol% of SRO mesocrystal in a YBCO matrix, corresponding to the density of SRO nanocrystals ∼5 × 109cm-2, which exhibits the typical characteristic of a metal-superconductor transition, and then increasing the magnetic interactions as a function of SRO embedment, the electronic correlation and the interplay between superconductivity and magnetism throughout the temperature regime were investigated. A metal-insulator transition in the normal state of YBCO and a crossover between superconductivity and magnetism at low temperatures were found upon increasing the density of nano-size SRO crystallites in the YBCO matrix as a consequence of competing interactions between these two ordered phases.
authors: Department of Physics, National Cheng Kung University, Tainan, 701, Taiwan and Department of Materials Science and Engineering, National Chiao Tung University, HsinChu, 300, Taiwan. yhc@nctu.edu.tw.
authors: Vandrangi
authors: V
authors: Suresh
authors: Department of Materials Science and Engineering, National Chiao Tung University, HsinChu, 300, Taiwan. yhc@nctu.edu.tw.
authors: Jheng-Cyuan
authors: JC
authors: Lin
authors: Department of Materials Science and Engineering, National Chiao Tung University, HsinChu, 300, Taiwan. yhc@nctu.edu.tw.
authors: Heng-Jui
authors: HJ
authors: Liu
authors: Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Austria.
authors: Zaoli
authors: Z
authors: Zhang
authors: Department of Electrophysics, National Chiao Tung University, HsinChu, 300, Taiwan.
authors: Ping-Chih
authors: PC
authors: Chiang
authors: Department of Electrophysics, National Chiao Tung University, HsinChu, 300, Taiwan.
authors: Yu-Ching
authors: YC
authors: Hsun
authors: Department of Physics, National Cheng Kung University, Tainan, 701, Taiwan.
authors: Yi-Chun
authors: http://orcid.org/0000-0001-9435-8596
authors: YC
authors: Chen
authors: Department of Electrophysics, National Chiao Tung University, HsinChu, 300, Taiwan.
authors: Jiunn-Yuan
authors: JY
authors: Lin
authors: Department of Materials Science and Engineering, National Chiao Tung University, HsinChu, 300, Taiwan. yhc@nctu.edu.tw and Institute of Physics, Academia Sinica, Taipei 105, Taiwan.
authors: Ying-Hao
authors: YH
authors: Chu