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Synthesis and Magnetic Properties of a Cyano-Bridged Bimetallic CuII–CrIII Polymer

Ma S. -L., Ren S.

Polish Journal of Chemistry

2009

Vol. 83, nr 10

1737-1744

A new bimetallic ferrimagnet, based on copper(II) macrocycle and hexacyano chromate(III) ions with formula {[CuL]3[Cr(CN)6]2źH2O}n (where L = 1,3,6,8,11,14- hexa -azatricyclo[12.2.1.18,11]octadecane) has been synthesized and magnetically characterized. Magnetic measurements confirm the compound showing a ferrimagnetic feature with Tc temperature about 6 K.

An impact of the state and type of surface layer on magnetic properties of Cu/Ni and Ni/Cu multilayers

Gągorowska B., Duś-Sitek M., Nabiałek M.

Optica Applicata

2009

Vol. 39, nr 4

839-844

This paper presents the results of investigation of magnetic properties in Cu/Ni multilayer systems. Based on the investigation of Ni/Cu and Cu/Ni systems with different thickness of magnetic and non-magnetic layers it was proved that the presence of ferromagnetic (F-F) and antiferromagnetic (A-F) exchange couplings depends on the quality of layers in artificial superlattice and on the state and type of free surface, superlattice structure and its roughness.

The influence of Ge on antiferromagnetic coupling in Fe/Si multilayers

Wandziuk P., Luciński T., Kopcewicz M.

Materials Science Poland

2006

Vol. 24, No. 3

861--865

The magnetic and structural properties of sputtered Fe/Ge, Fe/Ge/Si/Ge and Fe/Si/Ge/Si multilayers were studied. Magnetization measurements revealed the absence of antiferromagnetic coupling for Ge spacer. It was found that during the multilayer deposition a 0.5 nm thick Fe layer at each Fe/Ge interface became nonferromagnetic leading to formation of antiferromagnetic structures. Mössbauer spectra showed the existance of ferro- and/or antiferromagnetic structures at Fe/Ge interfaces, and ferromagnetic and paramagnetic structures at Fe/Si interfaces. We have found that substitution of Si by at least 0.5 nm of Ge in the 1.1 nm thick Si spacer led to disappearance of antiferromagnetic coupling in the Fe/Si multilayers.

New antiferromagnetic dinuclear complexes of manganese(II) with 1,8-naphthalato as bridging ligand: synthesis, spectrum and magnetism

Gao J., Ma S.L., Liao D.Z.

Polish Journal of Chemistry

1998

Vol. 72, nr 5

839-843

Three manganese(II) binuclear complexes have been synthetized, namely [Mn2(NAPH)(L)4(ClO4)2, L is bpy(2,2'-bipyridyl), phen(1,10-phenanthroline) or NO2-phen(5-nitro-1,10-phenanthroline), NAPH denotes the 1,8-naphthalate dianion. Based on IR, elemental analyses nd conductivity measurement, these complexes are proposed to have extended NAPH-bridges structures and consist of two manganese(II) in a distorted octahedron environment. The temperature dependence of magnetic susceptibilities of manganese(II) complexes have been studied, giving the exchange integral J=-0.36 cm-1 (bpy); J=-0.49 cm-1 (phen), respectively. These results indicate a weak antiferromagnetic coupling between the paramagnetic ions in the complexes.