TY - JOUR
T1 - Thermal stability of geometrically confined domain wall structures
AU - Sasaki, Munetaka
AU - Matsushita, Katsuyoshi
AU - Sato, Jun
AU - Imamura, Hiroshi
PY - 2010
Y1 - 2010
N2 - We investigate thermal stability of magnetic wall structure which is confined geometrically in a nano-contact. We measure free-energy as a function of magnetizations which characterize magnetic wall structures. Thermal stability is estimated from the free-energy barrier ΔF beyond which the system translates to another state. The typical value of k-1 BΔF is a few thousand Kelvin when the height of nano-contacts is 8 nm. The optimum shape of the nano-contact as magnetoresistance devices is clarified by examining the shape dependence of the free-energy barrier.
AB - We investigate thermal stability of magnetic wall structure which is confined geometrically in a nano-contact. We measure free-energy as a function of magnetizations which characterize magnetic wall structures. Thermal stability is estimated from the free-energy barrier ΔF beyond which the system translates to another state. The typical value of k-1 BΔF is a few thousand Kelvin when the height of nano-contacts is 8 nm. The optimum shape of the nano-contact as magnetoresistance devices is clarified by examining the shape dependence of the free-energy barrier.
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U2 - 10.1088/1742-6596/200/4/042022
DO - 10.1088/1742-6596/200/4/042022
M3 - Conference article
AN - SCOPUS:77957101766
SN - 1742-6588
VL - 200
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - SECTION 4
M1 - 042022
ER -