authors |
Khalyavin, DD; Chapon, LC; Suard, E; Parker, JE; Thompson, SP; Yaremchenko, AA; Kharton, VV |
nationality |
International |
journal |
PHYSICAL REVIEW B |
keywords |
LN; Y3+ |
abstract |
The high-temperature ferromagnetism in Sr3YCo4O10+delta perovskite, whose origin has been the subject of considerable debate, has been studied by neutron powder diffraction and synchrotron x-ray diffraction measurements. Oxygen vacancy ordering creates a complex pattern of zigzag stripes in the oxygen-deficient CoO4+delta layers, where the Co ions are found in three distinct coordinations. The symmetry of this unprecedented structural modulation, in conjunction with the existence of different Co spin states, provides a straightforward explanation for the appearance of ferrimagnetism. A model for the magnetic structure compatible with these structural features is proposed, based on the refinement of powder neutron data. The macroscopic moment as a function of temperature that can be calculated from the values of the ordered spins extracted from refinements is in excellent agreement with bulk magnetization. Unlike previous models, a collinear G-type magnetic structure with uncompensated moments due to distinct spin states of Co imposed by different coordination is found. |
publisher |
AMER PHYSICAL SOC |
issn |
1098-0121 |
year published |
2011 |
volume |
83 |
issue |
14 |
digital object identifier (doi) |
10.1103/PhysRevB.83.140403 |
web of science category |
Physics, Condensed Matter |
subject category |
Physics |
unique article identifier |
WOS:000289488300003
|
ciceco authors
impact metrics
journal analysis (jcr 2017):
|
journal impact factor |
3.813 |
5 year journal impact factor |
3.704 |
category normalized journal impact factor percentile |
73.881 |
dimensions (citation analysis):
|
|
altmetrics (social interaction):
|
|
|