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¿´µ½Ò»Æªpaper£¬ÀûÓÃLandau-Lifshitz-Gilbert ¹«Ê½¼ÆËãÆ¬×´¿ÅÁ£µÄ¸´´Åµ¼ÂÊ¡£(JAP 107,033913, 2010) http://scitation.aip.org/content/aip/journal/jap/107/3/10.1063/1.3291129 ÕÒµ½ÔʼÎÄÏ× (JAP 99, 083905, 2006) http://scitation.aip.org/content/aip/journal/jap/99/8/10.1063/1.2190719 ÏëÓ¦ÓÃÔÚ×Ô¼ºµÄʵÑéÉÏ£¬È¡×èÄáϵÊýa=0.1, Ðý´Å±Èr=2.8, 4*pi*Ms=20000, Ha=600, w=2*pi*f, дÁËÈçÏÂmatlab³ÌÐòÇó´Åµ¼ÂÊÕÅÁ¿u clc; clear; a=0.1; % alpha damping coeeficient r=2.8; % gamma gyromagnetic ratio (MHz/Oe) Ha=600; % anisotropy field (Oe) Ms=20000/(4*pi); % Ms c=1; % count the num of input array for f=1:0.1:18 % frequency array w=2*pi*f*10^3; % omega angular frequency wm=r*Ms; % omega m w0=r*Ha; % omega 0 w1=w0+j*w*a; % omega 0' u=1+((w1*wm)/((w1)^2-w^2)); % mu k=(-1)*w*wm/((w1)^2-w^2); % kappa u_tansor=[u, j*(-1)*k, 0; j*k, u, 0; 0, 0, 1;]; % permeability tensor ui_eig=eig(u_tansor); % eigenvalue ui ui_real=real(ui_eig); % real permeability ui_imag=-1*imag(ui_eig); % imagnary permeability D=[f; ui_real; ui_imag;]; U_data(:,c)=D; u_data=U_data'; c=c+1; end ÇóÖú¸÷λÁ½¸öÎÊÌ⣺ ´Åµ¼ÂÊÕÅÁ¿ÊÇ¿ÉÒÔÇó³öÀ´£¬µ«ÊÇ¿´ÆðÀ´ÊýÁ¿¼¶²»Ì«¶Ô¡£²»ÖªÊÇÄÄÀï³öÁËÎÊÌâ¡£ ÎÄÏ×˵¼ÆËãµÄ¸´´Åµ¼ÂÊÊÇÕÅÁ¿µÄÌØÕ÷Öµ¡£È»¶øÆäÌØÕ÷ÖµÊÇÒ»¸ö3*1µÄ¾ØÕ󣬼´Óжà¸öÌØÕ÷Öµ¡£Ó¦¸ÃÈ¡ÄĸöΪºÃ¡£ Çó°ïÖú£¬Ð»Ð»£¡ |
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