TY - JOUR
T1 - Quantum nucleation in a single-chain magnet
AU - Wernsdorfer, W.
AU - Clérac, R.
AU - Coulon, C.
AU - Lecren, L.
AU - Miyasaka, H.
PY - 2005/12/2
Y1 - 2005/12/2
N2 - The field sweep rate (v=dH/dt) and temperature (T) dependence of the magnetization reversal of a single-chain magnet is studied at low temperatures. As expected for a thermally activated process, the nucleation field (Hn) increases with decreasing T and increasing v. The set of Hn(T,v) data is analyzed with a model of thermally activated nucleation of magnetization reversal. Below 1 K, Hn becomes temperature independent but remains strongly sweep rate dependent. In this temperature range, the reversal of the magnetization is induced by a quantum nucleation of a domain wall that then propagates due to the applied field.
AB - The field sweep rate (v=dH/dt) and temperature (T) dependence of the magnetization reversal of a single-chain magnet is studied at low temperatures. As expected for a thermally activated process, the nucleation field (Hn) increases with decreasing T and increasing v. The set of Hn(T,v) data is analyzed with a model of thermally activated nucleation of magnetization reversal. Below 1 K, Hn becomes temperature independent but remains strongly sweep rate dependent. In this temperature range, the reversal of the magnetization is induced by a quantum nucleation of a domain wall that then propagates due to the applied field.
UR - http://www.scopus.com/inward/record.url?scp=28844444178&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=28844444178&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.95.237203
DO - 10.1103/PhysRevLett.95.237203
M3 - Article
AN - SCOPUS:28844444178
SN - 0031-9007
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
IS - 23
M1 - 237203
ER -