TY - JOUR
T1 - Anomalous pressure effect on the magnetic ordering in multiferroic BiMnO3
AU - Chou, C. C.
AU - Taran, S.
AU - Her, J. L.
AU - Sun, C. P.
AU - Huang, C. L.
AU - Sakurai, H.
AU - Belik, A. A.
AU - Takayama-Muromachi, E.
AU - Yang, H. D.
PY - 2008/9/11
Y1 - 2008/9/11
N2 - We report the magnetic-field-dependent dc magnetization and the pressure-dependent (pmax ∼16 kbar) ac susceptibilities χp (T) on both powder and bulk multiferroic BiMnO3 samples, synthesized in different batches under high pressure. A clear ferromagnetic (FM) transition is observed at TC ∼100 K, and increases with magnetic field. The magnetic hysteresis behavior is similar to that of a soft ferromagnet. Ac susceptibility data indicate that both the FM peak and its temperature (TC) decrease simultaneously with increasing pressure. Interestingly, above a certain pressure (9-11 kbar), another peak appears at Tp ∼93 K, which also decreases with increasing pressure, with both these peaks persisting over some intermediate pressure range (9-13 kbar). The FM peak disappears with further application of pressure; however, the second peak survives until present pressure limit (pmax ∼16 kbar). These features are considered to originate from the complex interplay of the magnetic and orbital structure of BiMnO3 being affected by pressure.
AB - We report the magnetic-field-dependent dc magnetization and the pressure-dependent (pmax ∼16 kbar) ac susceptibilities χp (T) on both powder and bulk multiferroic BiMnO3 samples, synthesized in different batches under high pressure. A clear ferromagnetic (FM) transition is observed at TC ∼100 K, and increases with magnetic field. The magnetic hysteresis behavior is similar to that of a soft ferromagnet. Ac susceptibility data indicate that both the FM peak and its temperature (TC) decrease simultaneously with increasing pressure. Interestingly, above a certain pressure (9-11 kbar), another peak appears at Tp ∼93 K, which also decreases with increasing pressure, with both these peaks persisting over some intermediate pressure range (9-13 kbar). The FM peak disappears with further application of pressure; however, the second peak survives until present pressure limit (pmax ∼16 kbar). These features are considered to originate from the complex interplay of the magnetic and orbital structure of BiMnO3 being affected by pressure.
UR - http://www.scopus.com/inward/record.url?scp=52249101185&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.78.092404
DO - 10.1103/PhysRevB.78.092404
M3 - 文章
AN - SCOPUS:52249101185
SN - 1098-0121
VL - 78
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 092404
ER -