Molecular magnetism in thin metallo-supramolecular films:: A combined neutron and soft X-ray reflectometry study

被引：4

作者：

Bodenthin, Y.

Schwarz, G.

Gutberlet, Th.

Geue, Th.

Stahn, J.

Moehwald, H.

Kurth, D. G.

Pietsch, U.

机构：

[1] Univ Siegen, D-57068 Siegen, Germany

[2] Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany

[3] ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[4] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[5] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2007年 / 41卷 / 2-3期

关键词：

supramolecular structures; X-ray magnetic circular dichroism; spin-resolved neutron reflectivity; Langmuir-Blodgett-films;

D O I：

10.1016/j.spmi.2006.06.022

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A detailed reflectometry study of Langmuir-Blodgett multilayers composed of a polyelectrolyteamphiphile complex (PAC) is presented. The PAC is self-assembled from metal ions, ditopic histerpyridines and amphiphiles. The structure as well as the vacuum stability of the LB multilayer is investigated by soft x-ray reflectometry. The multilayer has a periodicity of 57 A, which corresponds to an architecture of flat-lying MEPE rods and upright standing amphiphiles (hexadecyl phosphate, DHP). The films remain stable under high vacuum conditions. X-ray magnetic circular dichroism reveals a magnetic moment of 0.5 mu B/Fe2+ carried by the iron ions within the films. Using spin-resolved neutron reflectometry, Langmuir-Blodgett-films of PAC are identified as magnetic multilayer systems with the same characteristic d-spacing as it is found for the structural multilayer periodicity. The separation of the edges of total external reflection for spin up and spin down neutrons in presence of a magnetic moment is studied by time-of-flight neutron reflectornetry. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：138 / 145

页数：8

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