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Quantum tunneling of magnetization in single domain particles
Tejada Palacios, Javier; Balcells i Argemí, Lluís; Linderoth, S. (Soren); Perzynski, R.; Rigau, B.; Barbara, B.; Bacri, J. C. (Jean Claude)
Universitat de Barcelona
We present a study of the magnetic relaxation of several ferrofluids composed of particles of about 40 Å in diameter (Fe3O4FeC, CoFe2O4). Our key observation is a nonthermal character of the relaxation below 3 K for the CoFe2O4 ferrofluid and below 1 K for the FeC ferrofluid. The crossover temperature from thermal to nonthermal (quantum) regime is in accordance with theoretical suggestions of macroscopic quantum tunneling of magnetization in single doma in particles
Relaxació magnètica
Efecte túnel
Matèria condensada
Magnetic relaxation
Tunneling (Physics)
Condensed matter
(c) American Institute of Physics, 1993
American Institute of Physics

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