Structure and magnetism of Fe-Co alloy nanoparticles

被引：27

作者：

Klencsar, Z. ^{[1
]}

Nemeth, P. ^{[1
]}

Sandor, Z. ^{[1
]}

Horvath, T. ^{[1
]}

Sajo, I. E. ^{[2
]}

Meszaros, S. ^{[3
]}

Mantilla, J. ^{[4
]}

Coaquira, J. A. H. ^{[4
]}

Garg, V. K. ^{[4
]}

Kuzmann, E. ^{[5
]}

Tolnai, Gy. ^{[1
]}

机构：

[1] Hungarian Acad Sci, Res Ctr Nat Sci, Inst Mat & Environm Chem, Magyar Tudosok Korutja 2, H-1117 Budapest, Hungary

[2] Univ Pecs, Szentagothai Res Ctr, Ifjusag Str 20, H-7624 Pecs, Hungary

[3] Hungarian Acad Sci, Inst Nucl Res, Bem Ter 18-C, H-4026 Debrecen, Hungary

[4] Univ Brasilia, Inst Phys, BR-70919970 Brasilia, DF, Brazil

[5] Eotvos Lorand Univ, Inst Chem, Pazmany Ps 1-A, H-1117 Budapest, Hungary

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 674卷

关键词：

Nanoparticles; Disordered alloys; Hyperfine interactions; Mossbauer spectroscopy; HYPERFINE FIELD SPECTRA; CHEMICAL-SYNTHESIS; MOSSBAUER; RESONANCE; ORDER; NANOCRYSTALLITE; PARTICLES; NUCLEAR; FECO2O4; MOMENT;

D O I：

10.1016/j.jallcom.2016.03.068

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the hydrothermal synthesis and structure of FexCo1-x alloy nanoparticles with considerable stability against oxidation under ambient atmosphere. Powder X-ray diffractometry (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), inductively coupled plasma mass spectrometry (ICP-MS), Fe-57 Mossbauer spectroscopy and magnetization measurements are applied to characterize the composition, morphology, crystal structure, atomic order and magnetic properties of the nanoparticles. As-prepared samples are composed mainly of the bcc FexCo1-x alloy phase. TEM images of heat-treated samples confirm the nanoparticle nature of the original alloys. A consistent analysis of the experimental results leads to x approximate to 53% and x approximate to 62% Fe atomic ratio respectively in two analogous alloy samples, and suggests that the atomic level structure of the nanoparticles corresponds to that of a fully disordered (A2-type) alloy phase. Exploration of the effect of cobalt on the Fe-57 hyperfine parameters of iron microenvironments suggests that in these alloys the electronic state of Fe atoms is perturbed equally and in an additive manner by atoms in their first two coordination spheres. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：153 / 161

页数：9

共 55 条

[1] One-pot synthesis of high magnetization air-stable FeCo nanoparticles by modified polyol method [J].

Abbas, Mohamed ;

Islam, Md. Nazrul ;

Rao, B. Parvatheeswara ;

Ogawa, Tomoyuki ;

Takahashi, Migaku ;

Kim, CheolGi .

MATERIALS LETTERS, 2013, 91 :326-329

[2] Methods for the safe storage; handling; and disposal of pyrophoric liquids and solids in the laboratory [J].

Alnajjar, Mikhail ;

Quigley, David ;

Kuntamukkula, Murty ;

Simmons, Fred ;

Freshwater, David ;

Bigger, Samuel .

JOURNAL OF CHEMICAL HEALTH & SAFETY, 2011, 18 (01) :5-10

[3] IRON ALLOY FISCHER-TROPSCH CATALYSTS .4. REACTION AND SELECTIVITY STUDIES OF THE FECO SYSTEM [J].

ARCURI, KB ;

SCHWARTZ, LH ;

PIOTROWSKI, RD ;

BUTT, JB .

JOURNAL OF CATALYSIS, 1984, 85 (02) :349-361

[4] Synthesis of air stable FeCo alloy nanocrystallite by proteic sol-gel method using a rotary oven [J].

Braga, Tiago Pinheiro ;

Dias, Diego Felix ;

de Sousa, Matheus Falcao ;

Soares, Joao Maria ;

Sasaki, Jose Marcos .

JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 622 :408-417

[5] On the estimation of average crystallite size of zeolites from the Scherrer equation: A critical evaluation of its application to zeolites with one-dimensional pore systems [J].

Burton, Allen W. ;

Ong, Kenneth ;

Rea, Thomas ;

Chan, Ignatius Y. .

MICROPOROUS AND MESOPOROUS MATERIALS, 2009, 117 (1-2) :75-90

[6] Structural characterization study of FeCo alloy nanoparticles in a highly porous aerogel silica matrix [J].

Carta, D. ;

Mountjoy, G. ;

Gass, M. ;

Navarra, G. ;

Casula, M. F. ;

Corrias, A. .

JOURNAL OF CHEMICAL PHYSICS, 2007, 127 (20)

[7] Synthesis and magnetic behavior of ultra-small bimetallic FeCo/graphite nanoparticles [J].

Castrillon, M. ;

Mayoral, A. ;

Urtizberea, A. ;

Marquina, C. ;

Irusta, S. ;

Meier, J. G. ;

Santamaria, J. .

NANOTECHNOLOGY, 2013, 24 (50)

[8]

Chen C.W., 1986, MAGNETISM METALLURGY, P320

[9] Phosphate adsorption on synthetic goethite and akaganeite [J].

Chitrakar, Ramesh ;

Tezuka, Satoko ;

Sonoda, Akinari ;

Sakane, Kohji ;

Ooi, Kenta ;

Hirotsu, Takahiro .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2006, 298 (02) :602-608

[10] Order-Disorder Transformation in Fe50Co50 Particles Synthesized by Polyol Process [J].

Chon, G. B. ;

Shinoda, K. ;

Suzuki, S. ;

Jeyadevan, B. .

MATERIALS TRANSACTIONS, 2010, 51 (04) :707-711

← 1 2 3 4 5 6 →