TY - JOUR
T1 - Selective Magnetic Evolution of MnxFe1-xO Nanoplates
AU - Song, Hyon Min
AU - Zink, Jeffrey I.
AU - Khashab, Niveen M.
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2015/5/4
Y1 - 2015/5/4
N2 - Iron-manganese oxide (MnxFe1-xO) nanoplates were prepared by thermal decomposition method. Irregular development of crystalline phases was observed with the increase of annealing temperature. Magnetic properties are in accordance with their respective crystalline phases, and the selective magnetic evolution from their rich magnetism of MnxFe1-xO and MnFe2O4 is achieved by controlling the annealing conditions. Rock-salt structure of MnxFe1-xO (space group Fm-3m) is observed in as-synthesized nanoplates, while MnFe2O4 and MnxFe1-xO with significant magnetic interactions between them are observed at 380 °C. In nanoplates annealed at 450 °C, soft ferrites of Mn0.48Fe2.52O4 with MnxFe1-xO are observed. It is assumed that the differential and early development of crystalline phase of MnxFe1-xO, and the inhomogeneous cation mixing between Mn and Fe cause this rather extraordinary magnetic development. In particular, the prone nature of divalent metal oxides to cation vacancy and the prolonged annealing time of 15 hours which enables ordering are also thought to contribute to these irregularities.
AB - Iron-manganese oxide (MnxFe1-xO) nanoplates were prepared by thermal decomposition method. Irregular development of crystalline phases was observed with the increase of annealing temperature. Magnetic properties are in accordance with their respective crystalline phases, and the selective magnetic evolution from their rich magnetism of MnxFe1-xO and MnFe2O4 is achieved by controlling the annealing conditions. Rock-salt structure of MnxFe1-xO (space group Fm-3m) is observed in as-synthesized nanoplates, while MnFe2O4 and MnxFe1-xO with significant magnetic interactions between them are observed at 380 °C. In nanoplates annealed at 450 °C, soft ferrites of Mn0.48Fe2.52O4 with MnxFe1-xO are observed. It is assumed that the differential and early development of crystalline phase of MnxFe1-xO, and the inhomogeneous cation mixing between Mn and Fe cause this rather extraordinary magnetic development. In particular, the prone nature of divalent metal oxides to cation vacancy and the prolonged annealing time of 15 hours which enables ordering are also thought to contribute to these irregularities.
UR - http://hdl.handle.net/10754/552101
UR - http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b01938
UR - http://www.scopus.com/inward/record.url?scp=84929346903&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.5b01938
DO - 10.1021/acs.jpcc.5b01938
M3 - Article
SN - 1932-7447
VL - 119
SP - 10740
EP - 10748
JO - The Journal of Physical Chemistry C
JF - The Journal of Physical Chemistry C
IS - 19
ER -