TY - JOUR
T1 - Magnetic bit stability
T2 - Competition between domain-wall and monodomain switching
AU - Hoffman, Silas
AU - Tserkovnyak, Yaroslav
AU - Khalili Amiri, Pedram
AU - Wang, Kang L.
N1 - Funding Information:
The authors would like to thank Juan G. Alzate, Scott Bender, Ilya Krivorotov, and Pramey Upadhyaya for their stimulating input. This work was supported in part by the DARPA and the NSF under Grant No. DMR-0840965 (Y.T.).
PY - 2012/5/21
Y1 - 2012/5/21
N2 - We numerically study the thermal stability properties of computer memory storage realized by a magnetic ellipse. In the case of practical magnetic random-access memory devices, the bit can form a spin texture during switching events. To study the energy barrier for thermally induced switching, we develop a variational procedure to force the bit to traverse a smooth path through configuration space between the points of stability. We identify textured configurations realizing domain-wall propagation, which may have an energy barrier less than that of the corresponding monodomain model. We contrast the emergence of such micromagnetic effects in thermal versus field-induced switching.
AB - We numerically study the thermal stability properties of computer memory storage realized by a magnetic ellipse. In the case of practical magnetic random-access memory devices, the bit can form a spin texture during switching events. To study the energy barrier for thermally induced switching, we develop a variational procedure to force the bit to traverse a smooth path through configuration space between the points of stability. We identify textured configurations realizing domain-wall propagation, which may have an energy barrier less than that of the corresponding monodomain model. We contrast the emergence of such micromagnetic effects in thermal versus field-induced switching.
UR - https://www.scopus.com/pages/publications/84861810392
UR - https://www.scopus.com/pages/publications/84861810392#tab=citedBy
U2 - 10.1063/1.4716023
DO - 10.1063/1.4716023
M3 - Article
AN - SCOPUS:84861810392
SN - 0003-6951
VL - 100
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 21
M1 - 212406
ER -