Element = Lattice = Model = Element: N
Lattice: hcp
Model: MEAM_LAMMPS_LeeLeeKim_2006_FeN__MO_432861766738_000
Computed model cutoff of 3.5999999965727416 Angstroms
Computed isolated atomic energy of 0.0 eV for species N

==============================================================================
==============================================================================
 Starting optimization to find optimum lattice constant 'a' with c/a fixed to
 sqrt(8/3)
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = 1.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 40
         Function evaluations: 113
Results for this minimization:
  a = 4.150000000000007, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 40
         Function evaluations: 113
Results for this minimization:
  a = 3.768749999999999, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 40
         Function evaluations: 113
Results for this minimization:
  a = 4.1875, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 40
         Function evaluations: 113
Results for this minimization:
  a = 4.606250000000014, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 39
         Function evaluations: 111
Results for this minimization:
  a = 3.8250000000000055, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 39
         Function evaluations: 111
Results for this minimization:
  a = 4.143750000000003, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 38
         Function evaluations: 108
Results for this minimization:
  a = 3.7624999999999997, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 1.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 38
         Function evaluations: 108
Results for this minimization:
  a = 4.03125, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 38
         Function evaluations: 108
Results for this minimization:
  a = 4.300000000000005, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 37
         Function evaluations: 106
Results for this minimization:
  a = 3.7187500000000018, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 38
         Function evaluations: 109
Results for this minimization:
  a = 3.9375, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 37
         Function evaluations: 106
Results for this minimization:
  a = 3.681249999999997, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 37
         Function evaluations: 106
Results for this minimization:
  a = 3.875, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 37
         Function evaluations: 106
Results for this minimization:
  a = 4.068750000000003, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 36
         Function evaluations: 104
Results for this minimization:
  a = 3.712500000000004, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 2.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.018801
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 3.5952842934872025, total energy = -0.01880117561750715

Attempting to perform relaxation using initial lattice constant guess of a = 3.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 35
         Function evaluations: 101
Results for this minimization:
  a = 3.7500000000000018, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -0.018801
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 3.59528429369675, total energy = -0.018801175617507118

Attempting to perform relaxation using initial lattice constant guess of a = 3.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 34
         Function evaluations: 99
Results for this minimization:
  a = 3.7375000000000007, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 33
         Function evaluations: 96
Results for this minimization:
  a = 3.7125000000000004, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 94
Results for this minimization:
  a = 3.6750000000000003, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.625, total energy = 0.0

==============================================================================
==============================================================================
 Starting optimization with both a and c/a relaxed
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = [3.59528429] Angstroms and c = 4.6968597329527295 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.018940
         Iterations: 127
         Function evaluations: 251
Results for this minimization:
  a = 3.5999988006851598, c = 5.8618396694649455, total energy = -0.018939767751646762

Attempting to perform relaxation using initial lattice constant guess of a = [3.59528429] Angstroms and c = 4.990413466262275 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.018940
         Iterations: 192
         Function evaluations: 374
Results for this minimization:
  a = 3.5999988011353063, c = 5.861839669306461, total energy = -0.01893976775164678

Attempting to perform relaxation using initial lattice constant guess of a = [3.59528429] Angstroms and c = 5.283967199571821 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.018940
         Iterations: 142
         Function evaluations: 281
Results for this minimization:
  a = 3.599998800751086, c = 5.861839669649719, total energy = -0.01893976775164676

Attempting to perform relaxation using initial lattice constant guess of a = [3.59528429] Angstroms and c = 5.577520932881367 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.018940
         Iterations: 96
         Function evaluations: 223
Results for this minimization:
  a = 3.5930888704093076, c = 6.085240882827302, total energy = -0.018940043913782813

Attempting to perform relaxation using initial lattice constant guess of a = [3.59528429] Angstroms and c = 5.871074666190912 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.018940
         Iterations: 82
         Function evaluations: 172
Results for this minimization:
  a = 3.5999988014287645, c = 5.861839669070537, total energy = -0.01893976775164676

Attempting to perform relaxation using initial lattice constant guess of a = [3.59528429] Angstroms and c = 6.164628399500458 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.018940
         Iterations: 87
         Function evaluations: 214
Results for this minimization:
  a = 3.593088870491907, c = 6.422949943336489, total energy = -0.01894004391378281

Attempting to perform relaxation using initial lattice constant guess of a = [3.59528429] Angstroms and c = 6.458182132810004 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.018940
         Iterations: 82
         Function evaluations: 209
Results for this minimization:
  a = 3.593088870460843, c = 6.4511667273972595, total energy = -0.01894004391378279

Attempting to perform relaxation using initial lattice constant guess of a = [3.59528429] Angstroms and c = 6.7517358661195495 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.018940
         Iterations: 88
         Function evaluations: 210
Results for this minimization:
  a = 3.5930888704497255, c = 7.049226958301993, total energy = -0.018940043913782824

Attempting to perform relaxation using initial lattice constant guess of a = [3.59528429] Angstroms and c = 7.045289599429095 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -0.018940
         Iterations: 90
         Function evaluations: 223
Results for this minimization:
  a = 3.593088870450398, c = 7.163020192865636, total energy = -0.01894004391378286