Preparation, structural, dielectric and magnetic properties of LaFeO3-PbTiO3 solid solutions

0388221 - ÚJF 2013 RIV GB eng J - Článek v odborném periodiku
Ivanov, S. A. - Tellgren, R. - Porcher, F. - Ericsson, T. - Mosunov, A. - Beran, Přemysl - Korchagina, S. K. - Kumar, P. - Mathieu, R. - Nordblad, P.
Preparation, structural, dielectric and magnetic properties of LaFeO3-PbTiO3 solid solutions.
Materials Research Bulletin. Roč. 47, č. 11 (2012), s. 3253-3268. ISSN 0025-5408. E-ISSN 1873-4227
Institucionální podpora: RVO:61389005
Klíčová slova: ceramics * electronic materials * neutron scattering * X-ray diffraction * crystal structure * magnetic properties
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.913, rok: 2012

Solid solutions of (1-x)LaFeO3-(x)PbTiO3 (0 < x < 1) have been prepared by conventional solid-state reaction. These complex perovskites have been studied by means of X-ray (XRPD) and neutron powder (NPD) diffraction, complemented with dielectric, magnetic, heat capacity and Mossbauer measurements. Complete solubility in the perovskite series was demonstrated. The NPD and XRPD patterns were successfully refined as orthorhombic (x <= 0.7) and tetragonal (x >= 0.8). A composition-driven phase transformation occurs within the interval 0.7 < x < 0.8. The samples with x < 0.5 showed evidence of long-range magnetic ordering with an G-type antiferromagnetic arrangement of the magnetic moments of the Fe3+ cations in the B-site with propagation vector k = (0,0,0). Based on the obtained experimental data, a combined structural and magnetic phase diagram has been constructed. The factors governing the structural, dielectric and magnetic properties of (1-x)LaFeO3-(x)PbTiO3 solid solutions are discussed, as well as their possible multiferroicity.
Trvalý link: http://hdl.handle.net/11104/0217047