Charge ordering and phase competition in the layered perovskite
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Charge ordering and phase competition in the layered perovskite. / Argyriou, D.; Bordallo, H.; Campbell, B.; Cheetham, A.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 61, No. 22, 01.01.2000, p. 15269-15276.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Charge ordering and phase competition in the layered perovskite
AU - Argyriou, D.
AU - Bordallo, H.
AU - Campbell, B.
AU - Cheetham, A.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - Charge-lattice fluctuations are observed in the layered perovskite manganite (Formula presented) by Raman spectroscopy at temperatures as high as 340 K, and with decreasing temperature they become static, forming a charge-ordered (CO) phase below (Formula presented) In the static regime, superlattice reflections are observed by neutron and x-ray diffraction with a propagation vector (1/4, -1/4, 0). Crystallographic analysis of the CO state demonstrates that the degree of charge and orbital ordering in this manganite is weaker than that in the three-dimensional perovskite manganites. Below (Formula presented) type-A antiferromagnetism (AF) develops and competes with the charge ordering, causing it to eventually melt below (Formula presented) High-resolution diffraction measurements suggest that the CO and AF states do not coincide within the same region of material, but rather coexist as separate phases. The transition to type-A antiferromagnetism at lower temperatures is characterized by the competition between these two phases.
AB - Charge-lattice fluctuations are observed in the layered perovskite manganite (Formula presented) by Raman spectroscopy at temperatures as high as 340 K, and with decreasing temperature they become static, forming a charge-ordered (CO) phase below (Formula presented) In the static regime, superlattice reflections are observed by neutron and x-ray diffraction with a propagation vector (1/4, -1/4, 0). Crystallographic analysis of the CO state demonstrates that the degree of charge and orbital ordering in this manganite is weaker than that in the three-dimensional perovskite manganites. Below (Formula presented) type-A antiferromagnetism (AF) develops and competes with the charge ordering, causing it to eventually melt below (Formula presented) High-resolution diffraction measurements suggest that the CO and AF states do not coincide within the same region of material, but rather coexist as separate phases. The transition to type-A antiferromagnetism at lower temperatures is characterized by the competition between these two phases.
UR - http://www.scopus.com/inward/record.url?scp=0000985570&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.61.15269
DO - 10.1103/PhysRevB.61.15269
M3 - Journal article
AN - SCOPUS:0000985570
VL - 61
SP - 15269
EP - 15276
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 22
ER -
ID: 218269467