Author/Authors :
Blundell، نويسنده , , S.J. and Pratt، نويسنده , , F.L. and Marshall، نويسنده , , I.M. and Steer، نويسنده , , C.A. and Hayes، نويسنده , , W. and Létard، نويسنده , , J.-F. and Heath، نويسنده , , S.L. and Caneschi، نويسنده , , A. and Gatteschi، نويسنده , , D.، نويسنده ,
Abstract :
We present the results of recent muon-spin rotation (μSR) experiments on a variety of novel 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. The spin-crossover phenomenon has been studied in Fe(PM-PEA)2(NCS)2, which shows Gaussian and root-exponential muon relaxation in the high-spin and low-spin phases, respectively. Dy spin fluctuations have been studied with μSR in the ferrimagnetic chain Dy(hfac)3(NITEt). Experiments on a disc-shaped molecular complex containing Fe19 (with spin 312) reveal the effects of quantum tunneling of magnetization and allow an estimate of the quantum tunneling rate.
Keywords :
Muon-spin relaxation , ?SR , Molecular magnets , Spin fluctuations , Quantum tunneling , Nitronyl nitroxides , Magnetic clusters
