700 likes | 873 Views
Good Hysteresis on die g3. SW2140 – MTJ All shown junctions haven’t been broken down, can be further measured. Index . Potentially good junctions that have been further measured with finer field steps. ---------- 3 Junctions that may also be good but didn’t measure further. -------------- 21
E N D
Good Hysteresis on die g3 SW2140 – MTJ All shown junctions haven’t been broken down, can be further measured.
Index • Potentially good junctions that have been further measured with finer field steps. ---------- 3 • Junctions that may also be good but didn’t measure further. -------------- 21 • Something junctions that don’t fit the model. ------- 31 • Hysteresis with finer field steps and compare to the model ---------------------- 34 (most interesting data) • Summary ------------------ 67 (most interesting data)
Good Junctions Will be tested by finer field steps for hysteresis…
Also good junction… Fit the model, but may not worth further measure…
C29 – 40 x 100 E Hysteresis loop not stable
E25 – 50 x 100 R No sharp switching
F28 – 50 x 100 E No sharp switching
F30 – 50 x 100 E Hysteresis loop not stable
G25 – 50 x 100 H Peaks not even
J30 – 50 x 150 H Minor loop too narrow
M24 – 60 x 120 H No sharp switching
M26 – 60 x 120 H Hysteresis loop not stable
R28 – 80 x 160 E No sharp switching
Cannot understand Type 1: major loop looks OK, but no good minor loop, the two peaks in major loop have different height in most cases. Type 2: good minor loop, the two peaks in major loop are almost separate from each other. May require finer steps in major loop
Type 1 B26, B27, E30, F25, F26, I26, J21, J29….
Type 2 If this is only because major loop field steps are too large, then we have about 20 more possible good junctions
C26: 40 x 100 E Rmin : 1297 Ω Rmax:2718 Ω MR: 110% AP Region : Red: ( 0.025 T, 0.069 T ) Blue: ( -0.013 T , 0.043T ) Free Layer: -0.013 T ~ 0.025 T Hc = 19 mT SAF: 0.043 T ~ 0.069 T Hc = 13 mT
C26: 40 x 100 E Free: Hc = 19 mT SAF: Hc= 13 mT ( -0.013 T , 0.025 T ) ( 0.044 T , 0.070T )
C27: 40 x 100 E Rmin : 1271 Ω Rmax : 2675 Ω MR: 110 % AP Region : Red: ( 0.003 T , 0.068 T ) Blue: ( -0.024 T , 0.059 T ) Free Layer: -0.024 T ~ 0.03 T Hc = 13.5 mT SAF: 0.059 T ~ 0.068 T Hc = 4.5 mT
C27: 40 x 100 E Free: Hc = 14 mT SAF: Hc= 0.5 mT ( -0.025 T , 0.03 T ) ( 0.059T , 0.060T )
E28: 50 x 100 R Less steps More steps Not stable
I30: 50 x 150 E Rmin : 699 Ω Rmax :1433 Ω Magneto-Resistance :105% AP Region : Red: ( 0.018 T , 0.066 T ) Blue: ( -0.028 T , 0.053 T ) Free Layer: -0.028 T ~ 0.018 T Hc = 23 mT SAF: 0.053 T ~ 0.066 T Hc = 4 mT
I30: 50 x 150 E Free: Hc = 9.5 mT SAF: Hc= 5.5 mT ( 0.001 T , 0.02 T ) ( 0.053T , 0.064T )
J26: 50 x 150 H Rmin : 628 Ω Rmax : 1305Ω Magneto-Resistance : 108% AP Region : Red: ( 0.022 T , 0.078 T ) Blue: ( -0.029 T , 0.043 T ) Free Layer: -0.029 T ~ 0.022 T Hc = 25.5 mT SAF: 0.043 T ~ 0.078 T Hc = 17.5 mT
J26: 50 x 150 H Free: Hc = 7 mT SAF: Hc= 2.5 mT ( 0.008 T , 0.022 T ) ( 0.043T , 0.048T )
L24: 60 x 120 E Rmin : 645Ω Rmax : 1368Ω Magneto-Resistance : 112 % AP Region : Red: ( 0.036 T , 0.08 T ) Blue: ( -0.027 T , 0.051 T ) Free Layer: -0.027 T ~ 0.036 T Hc = 31.5 mT SAF: 0.051 T ~ 0.08 T Hc = 14.5 mT
L24: 60 x 120 E Free: Hc = 27.5 mT SAF: Hc= 0.5 mT ( -0.021 T , 0.036 T ) ( 0.052T , 0.053T )
O27: 60 x 180 E Rmin : 383 Ω Rmax :809 Ω Magneto-Resistance : 111 % AP Region : Red: ( 0.014 T , 0.06 T ) Blue: ( -0.024 T , 0.045 T ) Free Layer: -0.024 T ~ 0.014 T Hc = 19 mT SAF: 0.045 T ~ 0.06 T Hc = 7.5 mT
O27: 60 x 180 E Free: Hc = 3.5 mT SAF: Hc= 1 mT ( 0.006 T , 0.036 T ) ( 0.045T , 0.047T )
O30: 60 x 180 E Rmin : 444 Ω Rmax :860 Ω Magneto-Resistance : 94% AP Region : Red: ( -0.042 T , 0.038 T ) Blue: ( -0.041 T , 0.017 T ) Free Layer: -0.042 T ~ -0.041 T Hc = -0.5 mT SAF: 0.017 T ~ 0.038 T Hc = 10.5 mT Do not fit the model
O30: 60 x 180 E Free: Hc = 3.5 mT SAF: Hc= 9 mT ( -0.049 T , -0.042 T ) ( 0.017T , 0.028T )
P26: 60 x 180 H Rmin : 388 Ω Rmax :809 Ω Magneto-Resistance : 109% AP Region : Red: ( 0.013 T , 0.044 T ) Blue: ( -0.021 T , 0.038 T ) Free Layer: -0.021 T ~ -0.013 T Hc = 17mT SAF: 0.038 T ~ 0.044 T Hc = 3mT