La0.7Ca0.3-xSrxMnO3 manganites: Effect of structure on the magnetic and transport properties.
2002 (English)In: Journal of the Physical Society of Japan, ISSN 0031-9015, Vol. 71, no 3, 927-929 p.Article in journal (Refereed) Published
The effect of lattice structure on the magnetic and transport properties of La0.7Ca0.3-xSrxMnO3 (x= 0; 0.03; 0.06; ...; 0.3) lanthanum manganites have been studied. Curie temperature pressure coefficient, dTc/dP, showed the dependence on x value. Temperature Tc increased almost linearly under applied pressure as dTc/dP≈14 K/GPa and as dTc/dP≈7.5 K/GPa in the orthorhombic (Pbnm) and rhombohedral (R3c) phases, respectively. The value of dTc/dP(≈3.5 K/GPa) showed a minimum and a temperature of the resistance maximum, Tp(x), showed a change of slope at x=0.15, corresponding to the concentration structural phase transition. Differences between the values of dTc/dP and slopes of Tp versus x in Pbnm and R3c phases are explained by the different effect of external pressure on the Mn–O bond length and Mn–O–Mn bond angle, and by the different internal pressure effect in those phases, respectively
Place, publisher, year, edition, pages
The Physical Society of Japan , 2002. Vol. 71, no 3, 927-929 p.
lanthanum manganites, structure, phase transition, high pressure, susceptibility, resistance
Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-21856DOI: 10.1143/JPSJ.71.927OAI: oai:DiVA.org:umu-21856DiVA: diva2:212058