MAGNETIC-PROPERTIES OF SMALL NICKEL-OXIDE CLUSTERS ENCLOSED IN Y-ZEOLITE

被引：7

作者：

MATSUO, S ^{[1
]}

SATOU, S ^{[1
]}

SUZUKI, M ^{[1
]}

SANO, M ^{[1
]}

NAKANO, H ^{[1
]}

机构：

[1] UNIV TOKYO,INST IND SCI,TOKYO 106,JAPAN

来源：

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS | 1991年 / 18卷 / 03期

关键词：

D O I：

10.1007/BF01437082

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 [原子与分子物理]; 070304 [物理化学]; 081704 [应用化学]; 1406 [纳米科学与工程];

摘要：

The magnetization of small nickel oxide clusters containing less than four nickel atoms (sample A) and about ten atoms (sample B), respectively, formed inside the supercages of Y-zeolite, was studied in the magnetic field below 50 kOe and in the temperature range of 2 to 600 K. The magnetic susceptibility of sample A obeyed a Curie-Weiss' (C-W) law above about 20 K with a C-W temperature of 12 K. A saturation behavior was observed in the magnetization versus field (M-H) curve below about 20 K. A hysteresis in the M-H curve and a remanent magnetization were found below about 7 K. A similar behavior was observed for sample B. The observed positive C-W temperature indicates a ferromagnetic interaction between nickel ions in each cluster, which is semiquantitatively consistent with nearest neighbor ferromagnetic interactions previously reported for antiferromagnetic NiO single crystals. The hysteresis suggests an enhanced magnetic anisotropy energy in the present clusters.

引用

页码：281 / 285

页数：5

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