Citation
Sn. Mudretsova et al., Manganites of the (La1-xPrx)(0.7)Ca0.3MnO3-y series: Oxygen stoichiometry,thermal properties, and oxygen diffusion, RUSS J PH C, 74(10), 2000, pp. 1600-1603
Citations number
14
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY
ISSN journal
00360244
→ ACNP
Volume
74
Issue
10
Year of publication
2000
Pages
1600 - 1603
Database
ISI
SICI code
0036-0244(200010)74:10<1600:MOT(SO>2.0.ZU;2-P
Abstract
The thermal properties of manganites of the (La1-xPrx)(0.7)Ca0.3MnO3-y seri
es with perovskite-like structures were studied by thermogravimetry and dif
ferential scanning calorimetry. Endothermic effects were found to correspon
d to phase transitions with ferromagnetic ordering. The boundaries of the h
omogeneity regions with respect to oxygen were established with the use of
samples whose oxygen indices were determined iodometrically. Diffusion mobi
lity of oxygen at 950 degrees C and p(O-2) = 1 atm was studied by construct
ing distribution profiles of an oxygen isotopic tracer, which allowed the c
oncentration of oxygen vacancies to be estimated.