| dc.contributor.author |
Nguyen, Huy Sinh |
|
| dc.contributor.author |
Vu, Thanh Mai |
|
| dc.contributor.author |
Nguyen, Anh Tuan |
|
| dc.contributor.author |
Pham, Hong Quang |
|
| dc.contributor.author |
Nguyen, Tuan Son |
|
| dc.date.accessioned |
2011-04-18T08:26:19Z |
|
| dc.date.available |
2011-04-18T08:26:19Z |
|
| dc.date.issued |
2005 |
|
| dc.identifier.citation |
VNU. JOURNAL OF SCIENCE, Mathematics - Physics, T.xXI, n01, 2005 |
vi |
| dc.identifier.issn |
0866-8612 |
|
| dc.identifier.uri |
http://hdl.handle.net/123456789/441 |
|
| dc.description |
VNU. JOURNAL OF SCIENCE, Mathematics - Physics. Vol 21, No. 1, 2005 |
vi |
| dc.description.abstract |
The compounds of La1-xCaxMnO3-δ with x=0.46 and 0.50 occupy special
positions in the phase diagram of La1-xCaxMnO3-δ system due to their interesting
properties and charge-ordering phase transition. The samples were prepared by a
solid-state reaction method. The XPD patterns show that the samples are of a
single-phase orthorhombic-perovskite structure. The chemical compositions of the
samples are investigated by EDS. The concentrations of oxygen and Mn3+; Mn4+ ions
have been determined by dichromate method. The charge-ordering state have been
found below 150 K by magnetic and resistance measurements. This phenomenon
relates to metal-insulator transition. The results are discussed in competition
between double exchange (DE) and super-exchange (SE) interaction |
vi |
| dc.language.iso |
en |
vi |
| dc.publisher |
ĐHQGHN |
vi |
| dc.subject |
Compounds |
vi |
| dc.subject |
Magnetic properties |
vi |
| dc.title |
The magnetic properties and charge-ordering state in La1-xCaxMnO3 (x = 0.46; 0.50) compounds |
vi |
| dc.type |
Article |
vi |