Molecular magnets: Hybrid organic–inorganic layered compounds with very long-range ferromagnetism

✍ Scribed by V. Laget; C. Hornick; P. Rabu; M. Drillon; R. Ziessel

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 598 KB
• Volume: 178-180
• Category: Article
• ISSN: 0010-8545
• DOI: 10.1016/s0010-8545(98)00166-0

✦ Synopsis

The correlations between structures and magnetic properties of new hybrid layered compounds M 2 (OH ) 3 X (M=Co or Cu), where X is an exchangeable organic anion, are investigated. When the anion is a simple spacer (aliphatic chain), ferromagnetic in-plane interactions dominate, and the situation depends to a large extent on the interlayer spacing d. For small spacings (d<10 A ˚), 3D antiferromagnetic order is stabilized, while large spacings favor spontaneous magnetization, even for d#40 A ˚, due to dipolar through-space interactions. When X is a radical anion, new metal-radical magnets, with d close to 20 A ˚, are achieved. Strong interactions between the 3d and p electrons are evidenced, and a net magnetic moment occurs at low temperature. Such compounds are promising for the design of new molecular multiproperty materials.