Fast switching of bistable magnetic nanowires through collective spin reversal | Zendy

Alessandro Vindigni | Zendy; A. Rettori | Zendy; Lapo Bogani | Zendy; Andréa Caneschi | Zendy; Dante Gatteschi | Zendy; Roberta Sessoli | Zendy; Miguel A. Novak | Zendy

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Fast switching of bistable magnetic nanowires through collective spin reversal

Author(s) -

Alessandro Vindigni,

A. Rettori,

Lapo Bogani,

Andréa Caneschi,

Dante Gatteschi,

Roberta Sessoli,

Miguel A. Novak

Publication year - 2005

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2001160

Subject(s) - bistability , spins , nanowire , condensed matter physics , magnetization , magnetization reversal , scaling , magnetic hysteresis , hysteresis , relaxation (psychology) , materials science , magnetic relaxation , physics , magnetic anisotropy , nanotechnology , magnetic field , quantum mechanics , optoelectronics , psychology , social psychology , geometry , mathematics

The use of magnetic nanowires as memory units is made possible by theexponential divergence of the characteristic time for magnetization reversal atlow temperature, but the slow relaxation makes the manipulation of the frozenmagnetic states difficult. We suggest that finite-size segments can show a fastswitching if collective reversal of the spins is taken into account. Thismechanism gives rise at low temperatures to a scaling law for the dynamicsusceptibility that has been experimentally observed for the dilute molecularchain Co(hfac)2NitPhOMe. These results suggest a possible way of engineeringnanowires for fast switching of the magnetization.Comment: 9 pages, 3 figures, 20 reference

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