PARAMAGNETIC SUSCEPTIBILITY OF SUPPORTED NICKEL

被引：36

作者：

CARTER, JL

SINFELT, JH

机构：

[1] Central Basic Research Laboratory, Esso Research and Engineering Co., Linden, NJ

来源：

JOURNAL OF CATALYSIS | 1968年 / 10卷 / 02期

关键词：

D O I：

10.1016/0021-9517(68)90165-6

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：

The magnetic susceptibility of silica-supported nickel was investigated at temperatures above the normal Curie temperature of nickel, i.e., at temperatures where nickel behaves as a paramagnetic rather than a ferromagnetic substance. The paramagnetic behavior of the supported nickel was found to be significantly different from that of bulk nickel and to depend on the concentration of nickel on the support. The results show that the paramagnetic Curie temperature and the paramagnetic magneton number of the nickel decrease as the degree of dispersion of the nickel is increased. It is concluded that the electronic structure of nickel is a function of its state of dispersion. The effect is observed when the metal particles become sufficiently small that significant fractions of the atoms are present in the surface. © 1968.

引用

页码：134 / &

共 14 条

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[2]

Bean C.P., 1959, J APPL PHYS, V30, pS120, DOI [10.1063/1.2185850, DOI 10.1063/1.2185850]

[3] HYSTERESIS LOOPS OF MIXTURES OF FERROMAGNETIC MICROPOWDERS [J].