Magnetization and specific heat of La doped Sr2FeMoO6

M. TOVAR; J. SERENI; P. PEDRAZZINI; A. CANEIRO; F. PRADO; A. BUTERA; M.T. CAUSA

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2004 vol. 272 p. 857 - 858

0304-8853

We present high-temperature magnetization and low-temperature specific heat measurements performed on theelectron doped double perovskite Sr1.7La0.3FeMoO6. We have obtained the electronic contribution to Cp,g=11.5(5) mJ/molK2. The electronic susceptibility, derived from the magnetic measurements in the paramagneticregime (T>Tc=390 K), was we0=(4.971.5)
104 emu/mol. Antiferromagnetic coupling between localized anditinerant moments was inferred from the data, with a coupling constant l=(475750) mol/emu, that results in aferromagnetic-like Curie–Weiss susceptibility with Y=390(5) K. These results are compared with those obtained for theundoped material.