Synthesis, structural and magnetic properties of La1-xCaxFeO3 prepared by the co-precipitation method

被引：37

作者：

Abdel-Khalek, E. K. ^{[1
]}

Mohamed, Hany M. ^{[2
]}

机构：

[1] Al Azhar Univ, Fac Sci, Dept Phys, Cairo 11884, Egypt

[2] Al Azhar Univ, Fac Sci, Dept Chem, Cairo 11884, Egypt

来源：

HYPERFINE INTERACTIONS | 2013年 / 222卷

关键词：

Co-precipitation synthesis; Mossbauer spectroscopy; X-ray diffraction; Magnetic properties; MOSSBAUER; MICROSTRUCTURE; ORTHOFERRITES; PEROVSKITES; REACTIVITY; OXIDATION; CATALYSTS; SURFACE; SYSTEM; OXIDE;

D O I：

10.1007/s10751-012-0640-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Lanthanum calcium ferrite La1-xCaxFeO3 (where x = 0.05, 0.10 and 0.15) were synthesized by co-precipitation method. The structural refinement confirmed that all samples formed with the orthorhombic (Pbmn) structure with small impurities (LaFeO3 and Fe2O3). Fourier transformed infrared spectroscopy (FT-IR) results indicated that the electronic imbalance caused by the partial substitution for La3 + by Ca2 + is compensated by an oxidation state of iron ions. Mossbauer spectra at room temperature (RT) show five 6-line sub-spectra corresponding to Fe3 + (superposition of 3 spectra), Fe4 + and Fe5 + in all samples. Magnetic hysteresis loops of these samples showed a significant weak ferromagnetic component at RT.

引用

页码：S57 / S67

页数：11

共 34 条

[1] Study of the relationship between electrical and magnetic properties and Jahn-Teller distortion in R0.7Ca0.3Mn0.95Fe0.05O3 perovskites [J].

Abdel-Khalek, E. K. ;

El-Meligy, W. M. ;

Mohamed, E. A. ;

Amer, T. Z. ;

Sallam, H. A. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2009, 21 (02)

[2] Spectroscopic and structural analysis of Ca substituted La orthoferrite [J].

Ahmed, MA ;

Seoudi, R ;

El-Dek, SI .

JOURNAL OF MOLECULAR STRUCTURE, 2005, 754 (1-3) :41-44

[3] MOSSBAUER STUDIES ON THE SERIES LA1-XSRXFEO3 [J].

ALRAWWAS, AD ;

JOHNSON, CE ;

THOMAS, MF ;

DANN, SE ;

WELLER, MT .

HYPERFINE INTERACTIONS, 1994, 93 (1-4) :1521-1529

[4] Synthesis and characterisation of La1-xCaxFeO3 perovskite-type oxide catalysts for total oxidation of volatile organic compounds [J].

Barbero, Bibiana P. ;

Gamboa, Julio Andrade ;

Cadus, Luis E. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 65 (1-2) :21-30

[5] Determination of Fe(IV) species in partially substituted perovskite La0.6Ca0.4FeO3 [J].

Barbero, Bibiana P. ;

Cadus, Luis E. ;

Marchetti, Sergio G. .

HYPERFINE INTERACTIONS, 2009, 194 (1-3) :367-379

[6] Synthesis, characterization, and property studies of (La, Ag) FeO3 (0.0 ≤ x ≤ 0.3) perovskites [J].

Bellakki, Manjunath B. ;

Kelly, Brandon J. ;

Manivannan, V. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 489 (01) :64-71

[7] Synthesis and characterisation of La1-xSrxCoO3 with large surface area [J].

Berger, D ;

Fruth, V ;

Jitaru, I ;

Schoonman, J .

MATERIALS LETTERS, 2004, 58 (19) :2418-2422

[8] AFeO3 (A = La, Nd, Sm) and LaFe1-xMgxO3 perovskites as methane combustion and CO oxidation catalysts:: structural, redox and catalytic properties [J].

Ciambelli, P ;

Cimino, S ;

De Rossi, S ;

Lisi, L ;

Minelli, G ;

Porta, P ;

Russo, G .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 29 (04) :239-250

[9] THE EFFECT OF OXYGEN STOICHIOMETRY ON PHASE-RELATIONS AND STRUCTURE IN THE SYSTEM LA1-XSRXFEO3-DELTA (0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1, 0-LESS-THAN-OR-EQUAL-TO-DELTA-LESS-THAN-OR-EQUAL-TO-0.5) [J].

DANN, SE ;

CURRIE, DB ;

WELLER, MT ;

THOMAS, MF ;

ALRAWWAS, AD .

JOURNAL OF SOLID STATE CHEMISTRY, 1994, 109 (01) :134-144

[10]

Davydov A.A., 1990, Infrared Spectroscopy of Adsorbed Species on the Surface of Transition Metal Oxides

← 1 2 3 4 →