Determination of the size of Fe grains in Ag by Mossbauer spectroscopy

被引：13

作者：

Balogh, J.

Kaptas, D.

Vincze, I.

Temst, K.

Van Haesendonck, C.

机构：

[1] Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary

[2] Katholieke Univ Leuven, Vaste Stof Fys & Magnetisme Lab, B-3001 Louvain, Belgium

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.76.052408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The decrease of the average magnetic grain size with increasing Ag spacer thickness was deduced recently [J. Balogh, D. Kaptas, L. F. Kiss, T. Pusztai, E. Szilagyi, A. Tunyogi, J. Swerts, S. Vandezande, K. Tenst, and C. Van Haesendanck, Appl. Phys. Lett. 87, 102501 (2005)] from bulk magnetic properties of Fe/Ag granular multilayers. Now we show detailed Mossbauer spectroscopy measurements that support this finding and determine the hyperfine fields of Fe atoms in the grain boundaries. The grain size estimated by a simple model from the grain boundary fraction agrees well with that obtained from the external field dependence of the hyperfine field in the superparamagnetic state.

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页数：4

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