Orbital ordering induced by high impurity levels: Does long-range orbital ordering exist in manganites?

2002 ◽  
Vol 91 (7) ◽  
pp. 4267-4270 ◽  
Author(s):  
A. Maignan ◽  
C. Martin ◽  
M. Hervieu ◽  
B. Raveau
Keyword(s):  
Long Range ◽  
Orbital Ordering ◽  
High Impurity

Substrate-induced long-range orbital ordering in manganite films

2002 ◽  
Vol 66 (5) ◽  
Author(s):  
A. Shiraga ◽  
M. Milyaev ◽  
H. Honda ◽  
M. Izumi ◽  
K. Miyano
Keyword(s):  
Long Range ◽  
Orbital Ordering

scholarly journals Crystal and Magnetic Structure Transitions in BiMnO3+δ Ceramics Driven by Cation Vacancies and Temperature

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5805
Author(s):  
Dmitry V. Karpinsky ◽  
Maxim V. Silibin ◽  
Dmitry V. Zhaludkevich ◽  
Siarhei I. Latushka ◽  
Vadim V. Sikolenko ◽  
...  
Keyword(s):  
Magnetic Structure ◽  
Long Range ◽  
Orthorhombic Phase ◽  
Structural Transformations ◽  
Orbital Ordering ◽  
Scanning Calorimetry ◽  
Orbital Order ◽  
Two Phase ◽  
Range Magnetic Order ◽  
Oxygen Excess

The crystal structure of BiMnO3+δ ceramics has been studied as a function of nominal oxygen excess and temperature using synchrotron and neutron powder diffraction, magnetometry and differential scanning calorimetry. Increase in oxygen excess leads to the structural transformations from the monoclinic structure (C2/c) to another monoclinic (P21/c), and then to the orthorhombic (Pnma) structure through the two-phase regions. The sequence of the structural transformations is accompanied by a modification of the orbital ordering followed by its disruption. Modification of the orbital order leads to a rearrangement of the magnetic structure of the compounds from the long-range ferromagnetic to a mixed magnetic state with antiferromagnetic clusters coexistent in a ferromagnetic matrix followed by a frustration of the long-range magnetic order. Temperature increase causes the structural transition to the nonpolar orthorhombic phase regardless of the structural state at room temperature; the orbital order is destroyed in compounds BiMnO3+δ (δ ≤ 0.14) at temperatures above 470 °C.

Small crystal distortion and long-range antiferro-orbital ordering in the spinel oxide CoV2O4

2017 ◽  
Vol 96 (14) ◽  
Author(s):  
H. Ishibashi ◽  
S. Shimono ◽  
K. Tomiyasu ◽  
S. Lee ◽  
S. Kawaguchi ◽  
...  
Keyword(s):  
Long Range ◽  
Spinel Oxide ◽  
Orbital Ordering ◽  
Small Crystal
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