INVESTIGADORES
SANCHEZ Rodolfo Daniel
artículos
Título:
Electron spin resonance of La2−xSrxNiO4+δ
Autor/es:
R.D. SÁNCHEZ; M.T. CAUSA; M.J. SAYAGUES; J.M. GONZÁLEZ-CALBET; M. VALLET-REGI; X. OBRADORS
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 1993 vol. 190 p. 177 - 182
ISSN:
0921-4526
Resumen:
We present a room temperature ESR study of H2-reduced La2−xSrxNiO4+δ with 0 ⩽x ⩽0.5 and δ ⩽ 0. Samples prepared by a precursor method based on citrate solutions show ESR spectra which can be attributed to paramagnetic Ni ions in the neighborhood of O vacancies. The evolution of the spectrum with x is in agreement with magnetic and structural variations previously determined by neutron diffraction experiments. Samples prepared by a standard ceramic method showed contamination (∼1%) with metallic Ni particles, which prevented their ESR study.
