TY - JOUR
T1 - Evidence of a pressure-induced orbital transition in a layered manganite
AU - Kato, K.
AU - Ohishi, Y.
AU - Takata, M.
AU - Nishibori, E.
AU - Sakata, M.
AU - Moritomo, Y.
PY - 2005/1/1
Y1 - 2005/1/1
N2 - The charge density distribution of a bilayer manganite La 1.04Sr1.96Mn2O7 has been investigated by means of the maximum entropy method using the synchrotron radiation x-ray powder data. La1.04Sr1.96Mn 2O7 shows a layered-type (A-type) antiferromagnetic spin-ordering below TN≈200 K. We directly observed that application of pressure of several GPa at 17 K changes the orbital state from the two-dimensional dx2-y2 state to the three-dimensionally fluctuating state. This orbital transition, which is probably driven by the pressure-induced modification of the oxygen environment around the Mn site, causes the metallic conductivity as well as the ferromagnetism of the system.
AB - The charge density distribution of a bilayer manganite La 1.04Sr1.96Mn2O7 has been investigated by means of the maximum entropy method using the synchrotron radiation x-ray powder data. La1.04Sr1.96Mn 2O7 shows a layered-type (A-type) antiferromagnetic spin-ordering below TN≈200 K. We directly observed that application of pressure of several GPa at 17 K changes the orbital state from the two-dimensional dx2-y2 state to the three-dimensionally fluctuating state. This orbital transition, which is probably driven by the pressure-induced modification of the oxygen environment around the Mn site, causes the metallic conductivity as well as the ferromagnetism of the system.
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U2 - 10.1103/PhysRevB.71.012404
DO - 10.1103/PhysRevB.71.012404
M3 - Article
AN - SCOPUS:84860102684
VL - 71
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 1
M1 - 012404
ER -