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Durham University

Department of Physics

Staff profile

Publication details for Professor Tom Lancaster

Blundell, S.J., Pratt, F.L., Lancaster, T., Marshall, I.M., Steer, C.A., Hayes, W., Sugano, T., Letard, J.F., Caneschi, A., Gatteschi, D. & Heath, S.L. (2003). μSR study of organic systems: ferromagnetism, antiferromagnetism, the spin-crossover effect, and fluctuations in magnetic nanodiscs. Physica B condensed matter 326(1-4): 556-562.

Author(s) from Durham


We present the results of recent μSR 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 antiferromagnets. 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 Fe19 (with spin ) reveal the effects of quantum tunneling of magnetization and allow an estimate of the quantum tunneling rate.