the log of Fe-N：
Loop time of 1789.84 on 12 procs for 5000 steps with 300001 atoms

Performance: 0.024 ns/day, 994.357 hours/ns, 2.794 timesteps/s
98.7% CPU use with 12 MPI tasks x no OpenMP threads

MPI task timing breakdown:
Section |  min time  |  avg time  |  max time  |%varavg| %total
---------------------------------------------------------------
Pair    | 1147.4     | 1420.7     | 1616.6     | 513.4 | 79.37
Neigh   | 0.29078    | 5.1242     | 9.4327     | 153.1 |  0.29
Comm    | 138.05     | 338.19     | 616.37     |1070.9 | 18.89
Output  | 0.0044835  | 0.0051146  | 0.0051758  |   0.3 |  0.00
Modify  | 17.878     | 18.375     | 19.196     |  12.7 |  1.03
Other   |            | 7.495      |            |       |  0.42

Nlocal:        25000.1 ave       36988 max        1853 min
Histogram: 4 0 0 0 0 0 0 0 0 8
Nghost:        24872.6 ave       34869 max        8503 min
Histogram: 4 0 0 0 0 0 0 0 4 4
Neighs:              0 ave           0 max           0 min
Histogram: 12 0 0 0 0 0 0 0 0 0
FullNghs:  1.44852e+06 ave 2.17127e+06 max       82456 min
Histogram: 4 0 0 0 0 0 0 0 0 8

Total # of neighbors = 17382296
Ave neighs/atom = 57.940794
Neighbor list builds = 101
Dangerous builds = 44

the log of Fe-Cr：
Loop time of 101.255 on 16 procs for 5000 steps with 300001 atoms

Performance: 0.427 ns/day, 56.253 hours/ns, 49.380 timesteps/s
99.0% CPU use with 16 MPI tasks x no OpenMP threads

MPI task timing breakdown:
Section |  min time  |  avg time  |  max time  |%varavg| %total
---------------------------------------------------------------
Pair    | 18.159     | 40.435     | 50.16      | 158.5 | 39.93
Neigh   | 0.0009158  | 10.658     | 16.832     | 194.6 | 10.53
Comm    | 2.1373     | 8.559      | 10.523     |  91.3 |  8.45
Output  | 0.0044983  | 0.0047169  | 0.0047394  |   0.1 |  0.00
Modify  | 20.396     | 34.463     | 67.198     | 259.9 | 34.04
Other   |            | 7.134      |            |       |  7.05

Nlocal:        18750.1 ave       28108 max           0 min
Histogram: 4 0 0 0 0 0 0 4 0 8
Nghost:        20183.9 ave       33208 max           2 min
Histogram: 4 0 0 0 0 0 4 4 0 4
Neighs:              0 ave           0 max           0 min
Histogram: 16 0 0 0 0 0 0 0 0 0
FullNghs:   2.5601e+06 ave 3.90754e+06 max           0 min
Histogram: 4 0 0 0 0 0 4 0 0 8

Total # of neighbors = 40961662
Ave neighs/atom = 136.53842
Neighbor list builds = 91
Dangerous builds = 0