Characterization of highly dispersed bimetallic Ni-Cu alloy particles by ferromagnetic resonance

被引：8

作者：

Morke, W

Bieruta, T

Jarsetz, J

Gorsmann, C

Schubert, U

机构：

[1] UNIV WURZBURG,INST ANORGAN CHEM,D-97074 WURZBURG,GERMANY

[2] TECH UNIV VIENNA,INST ANORGAN CHEM,A-1060 VIENNA,AUSTRIA

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1996年 / 115卷

关键词：

calculation of FMR powder spectra; ferromagnetic resonance; magnetostriction; nanocomposites; nickel-copper alloys;

D O I：

10.1016/0927-7757(96)03658-8

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：

Nanocomposites of the nominal composition Ni0.4Cu0.6. nSiO(2) (n = 3,6,9,12,15,20) were investigated by means of ferromagnetic resonance (FMR), to study the influence of metal particle composition and size, and of the metal-matrix interaction on the FMR powder spectra. The thermomagnetic investigations (I-ref(exp)-T dependence) revealed that all nanocomposites except n = 20 posses a bimodal metal particle composition. The Ni-rich component with diameter 8-13 nm consists of about Ni0.9Cu0.1 and the Cu-rich component with diameter 5-11 nm of about Ni0.7Cu0.3 alloy particles. In Ni0.4Cu0.6. 20SiO(2) only the Ni-rich component was detected. By spectral simulation the metal-matrix interaction was characterized at 273 and 423 K by compressive and tensile stress, respectively. The change in sign of the strain at 300 K below the reduction temperature points to the high mobility of the alloy.

引用

页码：303 / 309

页数：7

共 31 条

[1]

BERTAUT F, 1951, CR HEBD ACAD SCI, V223, P356

[2] ELECTRON-MICROSCOPY AND MAGNETIC STUDIES OF THE INTERACTION BETWEEN NICKEL AND SILICA - CONSIDERATIONS ON POSSIBLE ANCHORING SITES [J].