TY - JOUR
T1 - Anomalous ferromagnetic behavior and large magnetoresistance induced by orbital fluctuation in heavily doped Nd1-x Srx Mn O3 (0.57≤x≤0.75)
AU - Akahoshi, D.
AU - Hatakeyama, R.
AU - Nagao, M.
AU - Asaka, T.
AU - Matsui, Y.
AU - Kuwahara, H.
PY - 2008/2/4
Y1 - 2008/2/4
N2 - We have elaborately investigated heavily doped Nd1-x Srx Mn O3 with x=0.57-0.75. 3 z2 - r2 and x2 - y2 orbital orders strongly compete with each other at x=0.625. The competition causes spatial orbital fluctuation on nanometer scale below the orbital ordering temperature (TOO ∼500 K), which is evidenced by the observation of tweed structure using transmission electron microscopy. The orbital fluctuation, which persists down to lowest temperatures, gives rise to anomalous ferromagnetic behavior and concomitant large magnetoresistance well below the Néel temperature (TN =220 K).
AB - We have elaborately investigated heavily doped Nd1-x Srx Mn O3 with x=0.57-0.75. 3 z2 - r2 and x2 - y2 orbital orders strongly compete with each other at x=0.625. The competition causes spatial orbital fluctuation on nanometer scale below the orbital ordering temperature (TOO ∼500 K), which is evidenced by the observation of tweed structure using transmission electron microscopy. The orbital fluctuation, which persists down to lowest temperatures, gives rise to anomalous ferromagnetic behavior and concomitant large magnetoresistance well below the Néel temperature (TN =220 K).
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U2 - 10.1103/PhysRevB.77.054404
DO - 10.1103/PhysRevB.77.054404
M3 - Article
AN - SCOPUS:38849156856
SN - 1098-0121
VL - 77
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 5
M1 - 054404
ER -