Synthesis and anomalous magnetic properties of LaFeO3 nanoparticles by hot soap method

被引：45

作者：

Fujii, Tatsuo ^{[1
]}

Matsusue, Ikkoh ^{[1
]}

Nakatsuka, Daisuke ^{[1
]}

Nakanishi, Makoto ^{[1
]}

Takada, Jun ^{[1
]}

机构：

[1] Okayama Univ, Dept Appl Chem, Okayama 7008530, Japan

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 129卷 / 03期

关键词：

LaFeO3; nanoparticles; Hot soap technique; Superparamagnetism; Surface magnetization; COPRECIPITATION; POWDERS;

D O I：

10.1016/j.matchemphys.2011.05.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline LaFeO3 particles were synthesized at low temperatures by using hot soap technique. The synthesis was based on the thermal decomposition of organometallic compounds precipitated in a hot coordinating solvent. Moderate heat treatment at low temperature far below the combustion point of organic compounds produced spherical LaFeO3 nanoparticles with average diameter of about 15 nm. The crystalline phase, structure and particle size of obtained products were characterized by Xray diffraction, infrared spectroscopy and transmission electron microscopy observations. In spite of the antiferromagnetic nature of bulk LaFeO3, the obtained nanoparticles exhibited anomalous large magnetization. Superparamagnetic behavior with a blocking temperature of about 30 K was observed in both magnetization and Mossbauer spectroscopic analyses. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：805 / 809

页数：5

共 28 条

[1] Synthesis and characterization of non-stoichiometric LaFeO3 perovskite [J].

Delmastro, A ;

Mazza, D ;

Ronchetti, S ;

Vallino, M ;

Spinicci, R ;

Brovetto, P ;

Salis, M .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2001, 79 (02) :140-145

[2] Pure phase LaFeO3 perovskite with improved surface area synthesized using different routes and its characterization [J].

Gosavi, Priti V. ;

Biniwale, Rajesh B. .

MATERIALS CHEMISTRY AND PHYSICS, 2010, 119 (1-2) :324-329

[3] High temperature transport kinetics in heteroepitaxial LaFeO3 thin films [J].

Hole, I ;

Tybell, T ;

Grepstad, JK ;

Wærnhus, I ;

Grande, T ;

Wiik, K .

SOLID-STATE ELECTRONICS, 2003, 47 (12) :2279-2282

[4] Sr- and Ni-doped LaCaO3 and LaFeO3 perovskites -: New cathode materials for solid-oxide fuel cells [J].

Huang, K ;

Lee, HY ;

Goodenough, JB .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1998, 145 (09) :3220-3227

[5] Microstructures and electrical properties of calcium substituted LaFeO3 as SOFC cathode [J].

Hung, Ming-Hao ;

Rao, M. V. Madhava ;

Tsai, Dah-Shyang .

MATERIALS CHEMISTRY AND PHYSICS, 2007, 101 (2-3) :297-302

[6] Atomic-scale magnetic modeling of oxide nanoparticles [J].

Kodama, RH ;

Berkowitz, AE .

PHYSICAL REVIEW B, 1999, 59 (09) :6321-6336

[7] Gas sensing with perovskite-like oxides having ABO3 and BO3 structures [J].

Lantto, V ;

Saukko, S ;

Toan, NN ;

Reyes, LF ;

Granqvist, CG .

JOURNAL OF ELECTROCERAMICS, 2004, 13 (1-3) :721-726

[8] Size-driven magnetic transitions in monodisperse MnO nanocrystals [J].

Lee, Yi-Cheng ;

Pakhomov, Alexandre B. ;

Krishnan, Kannan M. .

JOURNAL OF APPLIED PHYSICS, 2010, 107 (09)

[9] PREPARATION OF NANOCRYSTALLINE LAFEO3 USING REVERSE DROP COPRECIPITATION WITH POLYVINYL-ALCOHOL AS PROTECTING AGENT [J].

LI, X ;

ZHANG, HB ;

ZHAO, MY .

MATERIALS CHEMISTRY AND PHYSICS, 1994, 37 (02) :132-135

[10]

LI X, 1991, HYPERFINE INTERACT, V69, P851, DOI 10.1007/BF02401960

← 1 2 3 →