caa a22 4500 445303549 CHVBK 20180317142605.0 cr unu---uuuuu 170323e20100301xx s 000 0 eng 10.1007/s12274-010-1023-3 doi (NATIONALLICENCE)springer-10.1007/s12274-010-1023-3 Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor [Elektronische Daten] [Xiaofei Zhao, Sailong Xu, Lianying Wang, Xue Duan, Fazhi Zhang] NiFe2O4 nanoparticles (<10 nm) embedded in a NiO matrix have been fabricated by calcining the corresponding NiIIFeIII-layered double hydroxide (LDH) precursors at high temperature (500 °C). Compared with the NiFe2O4/NiO nanocomposite obtained by calcination of a precursor prepared by a traditional chemical coprecipitation method, those derived from NiFe-LDH precursors show much higher blocking temperatures (T B) (˜380 K). The enhanced magnetic stability can be ascribed to the much stronger interfacial interaction between NiFe2O4 and NiO phases due to the topotactic nature of the transformation of the LDH precursor to the NiFe2O4/NiO composite material. Through tuning the NiII/FeIII molar ratio of the NiFe-LDH precursor, the NiFe2O4 concentration can be precisely controlled, and the T B value as well as the magnetic properties of the final material can also be regulated. This work represents a successful example of the fabrication of ferro(ferri)magnetic (FM)/antiferrimagnetic (AFM) systems with high magnetic stability from LDH precursors. This method is general and may be readily extended to other FM/AFM systems due to the wide range of available LDH precursors. Tsinghua University Press and Springer-Verlag Berlin Heidelberg, 2010 Layered double hydroxide nationallicence topotactic mechanism nationallicence interfacial interaction nationallicence exchange bias nationallicence magnetic stability nationallicence Zhao Xiaofei State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Xu Sailong State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Wang Lianying State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Duan Xue State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Zhang Fazhi State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut Nano Research Tsinghua Press 3/3(2010-03-01), 200-210 1998-0124 3:3<200 2010 3 12274 https://doi.org/10.1007/s12274-010-1023-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12274-010-1023-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhao Xiaofei State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 700 1- Xu Sailong State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 700 1- Wang Lianying State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 700 1- Duan Xue State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 700 1- Zhang Fazhi State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China aut NATIONALLICENCE 773 0- Nano Research Tsinghua Press 3/3(2010-03-01), 200-210 1998-0124 3:3<200 2010 3 12274 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer