Near equiatomic FeCo nanocrystalline alloy embedded in an alumina aerogel matrix: Microstructural features and related magnetic properties

被引：22

作者：

Casula, MF

Concas, G

Congiu, F

Corrias, A

Falqui, A

Spano, G

机构：

[1] Univ Cagliari, Dipartimento Sci Chim, I-09042 Monserrato, Cagliari, Italy

[2] Univ Cagliari, INSTM, I-09042 Monserrato, Cagliari, Italy

[3] Univ Cagliari, Dipartimento Phys, I-09042 Monserrato, Cagliari, Italy

[4] CINSM, I-09042 Monserrato, Cagliari, Italy

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 50期

关键词：

D O I：

10.1021/jp0546554

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：

FeCo-Al2O3 nanocomposite aerogels were studied by high-resolution electron microscopy, energy filtered transmission electron microscopy, Mossbauer spectroscopy, and measurements of static magnetizations and hysteretic behavior. The combined use of such techniques provided insights on the formation of bcc FeCo nanocrystalline particles inside the alumina matrix, which is promoted by thermal treatment under hydrogen flow of the parent aerogel. Sample characteristics such as alloy composition and crystallinity, influence of the matrix on the structural evolution, and resulting magnetic properties were investigated as a function of the temperature and time of the reduction treatment.

引用

页码：23888 / 23895

页数：8

共 35 条

[31] Electronic structure and magnetization of Fe-Co alloys and multilayers [J].

Paduani, C ;

Krause, JC .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (01) :578-583

[32]

Saad AM, 2004, REV ADV MATER SCI, V8, P152

[33]

Scherrer G.W, 1990, DRYING SOL GEL SCI

[34] Magnetic properties of ultrafine ferrihydrite clusters studied by Mossbauer spectroscopy and by thermodynamical analysis [J].

Suzdalev, IP ;

Buravtsev, V ;

Imshennik, VK ;

Maksimov, YV ;

Matveev, VV ;

Novichikhin, SV ;

Trautwein, AX ;

Winkler, H .

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 1996, 37 (01) :55-61

[35]

Wickman H-H, 1966, MOSSBAUER EFFECT MET, V2, P39

← 1 2 3 4 →