Asymmetric phase diagram and phase separation in Pr0:5
dCa0:2þdSr0:3MnO3 ð
0:04pdp0:04Þ

D. NIEBIESKIKWIAT; D.M. SANCHEZ; A. CANEIRO; B. MAIOROV

PHYSICA B - CONDENSED MATTER

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2002 vol. 320 p. 111 - 114

0921-4526

We present electric and magnetic properties of polycrystalline Pr0:5
dCa0:2þdSr0:3MnO3; for d between
0:04 and0:04; where the hole concentration is n ¼ 0:5 þ d: In this series, we study the effects of moving n away from 0:5 on both,the phase diagram and phase separated state. We found that the low temperature ferromagnetic fraction XFMcontinuously decreases when n increases. As a result, the samples with no0:5 (large XFM) exhibit metallic resistivity atlow T while for n > 0:5 the insulating state predominates. We construct a detailed T–n phase diagram showing theasymmetries around half-doping.