Comment on "Magnetization of two-dimensional square arrays of nanomagnets"
Abbreviated Journal Title
Phys. Rev. B
Physics, Condensed Matter
Recently, Takagaki and Ploog [Phys. Rev. B 71, 184439 (2005)] used a fourth-order Runge-Kutta technique to integrate the Landau-Lifschitz-Gilbert equations for square lattices of NxN magnetic nanodots with dipolar interdot interactions. Some of their results appeared to differ qualitatively from the second-order Runge-Kutta results obtained for the same systems by Kayali and Saslow [Phys. Rev. B 70, 174404 (2004)], both in the hysteresis area A(N) and in the number of steps of the magnetization hysteresis loops. We show that these differences are not due to inaccuracies in either calculation or to the potentially different magnetic induction sweep rates used, but can be attributed entirely to different choices of the dipolar interaction strength h(dip)proportional to a(-3), where a is the two-dimensional lattice constant.
Physical Review B
"Comment on "Magnetization of two-dimensional square arrays of nanomagnets"" (2006). Faculty Bibliography 2000s. 7921.