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

Tatsuo Fujii; Ikkoh Matsusue; Daisuke Nakatsuka; Makoto Nakanishi; Jun Takada

doi:10.1016/j.matchemphys.2011.05.015

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

Tatsuo Fujii, Ikkoh Matsusue, Daisuke Nakatsuka, Makoto Nakanishi, Jun Takada

Research output: Contribution to journal › Article › peer-review

49 Citations (Scopus)

Abstract

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 X-ray 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 Mössbauer spectroscopic analyses.

Original language	English
Pages (from-to)	805-809
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	129
Issue number	3
DOIs	https://doi.org/10.1016/j.matchemphys.2011.05.015
Publication status	Published - Oct 3 2011

Keywords

Hot soap technique
LaFeO nanoparticles
Superparamagnetism
Surface magnetization

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2011.05.015

Cite this

@article{f8ff2969e7db4c3b9ba2fae03a996de9,

title = "Synthesis and anomalous magnetic properties of LaFeO3 nanoparticles by hot soap method",

abstract = "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 X-ray 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 M{\"o}ssbauer spectroscopic analyses.",

keywords = "Hot soap technique, LaFeO nanoparticles, Superparamagnetism, Surface magnetization",

author = "Tatsuo Fujii and Ikkoh Matsusue and Daisuke Nakatsuka and Makoto Nakanishi and Jun Takada",

year = "2011",

month = oct,

day = "3",

doi = "10.1016/j.matchemphys.2011.05.015",

language = "English",

volume = "129",

pages = "805--809",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier BV",

number = "3",

}

TY - JOUR

T1 - Synthesis and anomalous magnetic properties of LaFeO3 nanoparticles by hot soap method

AU - Fujii, Tatsuo

AU - Matsusue, Ikkoh

AU - Nakatsuka, Daisuke

AU - Nakanishi, Makoto

AU - Takada, Jun

PY - 2011/10/3

Y1 - 2011/10/3

N2 - 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 X-ray 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 Mössbauer spectroscopic analyses.

AB - 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 X-ray 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 Mössbauer spectroscopic analyses.

KW - Hot soap technique

KW - LaFeO nanoparticles

KW - Superparamagnetism

KW - Surface magnetization

UR - http://www.scopus.com/inward/record.url?scp=79960558353&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79960558353&partnerID=8YFLogxK

U2 - 10.1016/j.matchemphys.2011.05.015

DO - 10.1016/j.matchemphys.2011.05.015

M3 - Article

AN - SCOPUS:79960558353

SN - 0254-0584

VL - 129

SP - 805

EP - 809

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 3

ER -