mu SR study of organic systems: ferromagnetism, antiferromagnetism, the spin-crossover effect, and fluctuations in magnetic nanodiscs

Conference item

We present the results of recent muSR experiments on a variety of novel organic and molecular magnetic systems. Muons are sensitive to local static fields and magnetic fluctuations, but can probe much more than just the onset of long-range magnetic order. We review our work on nitronyl nitroxide organic ferromagnets and anti ferromagnets. We describe a muon study of the spin-crossover phenomenon which has been studied in Fe(PM-PEA)(2)(NCS)(2), and which shows Gaussian and root-exponential muon relaxation in the high-spin and low-spin phases, respectively. Experiments on a disc-shaped molecular complex containing Fe-19 (with spin 31/2) reveal the effects of quantum tunneling of magnetization and allow an estimate of the quantum tunneling rate. (C) 2002 Elsevier Science B.V. All rights reserved.

Authors: Blundell, S; Pratt, F; Lancaster, T; Marshall, I; Steer, C

• Publication status: Published
• Journal: PHYSICA B-CONDENSED MATTER
• Volume: 326
• Issue: 1-4
• Pages: 556-562
• Publication date: 2003-02-01
• Event title: 9th International Conference on Munon Spin Rotation, Relaxation and Resonance (MuSR)
• DOI: 10.1016/S0921-4526(02)01688-5
• ISSN: 0921-4526
• Keywords: quantum tunneling; molecular magnet; nanodisc; organic magnet