title: A Niccolite Structural Multiferroic Metal-Organic Framework Possessing Four Different Types of Bistability in Response to Dielectric and Magnetic Modulation.
abstract: Multiple switchable physical properties have been demonstrated in one single niccolite structural metal-organic framework, [(CH3CH2)2NH2][FeIIIFeII(HCOO)6] (1), including (i) a reversible ferroelastic phase transition triggered by freezing the disordered (CH3CH2)2NH2+cations, (ii) a thermally switchable dielectric constant transition accompanied by phase transition, and (iii) thermal and positive magnetic field driven magnetic poles reversal at low temperatures, attributed to different responses of the magnetization of FeIIand FeIIIsublattices to external stimuli. More interestingly, the exchange anisotropy between the two sublattices can also give rise to tunable positive and negative exchange bias fields. Straightforwardly, such diverse demonstrations of bistability in one single material (depending on the specific tuning way) will provide extra freedom and flexibility for the design of switcher devices.
authors.affiliation: State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.|School of Chemistry and Chemical Engineering, TKL of Organic Solar Cells and Photochemical Conversion, Tianjin University of Technology, Tianjin, 300387, China.
authors.forename: Jiong-Peng
authors.initials: JP
authors.lastname: Zhao
authors.affiliation: School of Materials Science and Engineering, TKL of Metal and Molecule-Based Material Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
authors.forename: Song-De
authors.initials: SD
authors.lastname: Han
authors.affiliation: State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
authors.forename: Qing-Lun
authors.initials: QL
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.|School of Materials Science and Engineering, TKL of Metal and Molecule-Based Material Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, China.
authors.forename: Xian-He
authors.initials: XH
authors.lastname: Bu
keywords: bipolar switching; bistability; exchange bias; ferroelastic phase transition; switchable dielectric constant