Dynamical effects in magnetic and transport properties of phase separated La0.5Ca0.5Mn0.95Fe0.05O3

L. GRANJA, E. INDELICATO, P. LEVY, G. POLLA, D. VEGA, F. PARISI*

PHYSICA B - CONDENSED MATTER

ELSEVIER SCIENCE BV

Lugar: New York; Año: 2002 vol. 320 p. 94 - 98

0921-4526

We have measured transport and magnetic properties of polycrystalline La0.5Ca0.5Mn0.95Fe0.05O3, a phase separated manganite with ferromagnetic ground state. Cooling rate dependences and time relaxation were found; the coexistence of ferromagnetic and charge ordered regions determines a dynamics which influences physic al properties. We show that a dynamical contribution to the resistivity can account for the observed cooling rate dependence and ageing effects on this phase separated manganite. r 2002 Published by Elsevier Science B.V. Keywords: Manganites; Phase separation; Relaxation