Home / Magnets / Sm2Fe9Cu (MAG-000278)

Sm2Fe9Cu

Ternary

Crystal Structure

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Overview

Magnetic flux density1.324T
Magnetization density0.114μB Å−3
Total spin moment20.467μB cell−1
MP-reference hull distance0.064eV atom−1
Cell volume180.120Å3
Number of atoms12atoms
Chemical system Sm-Fe-Cu Calculation Converged

Final Relaxed Cell

Calculated-cell formulaCuFe9Sm2
a, b, c5.071, 5.071, 8.089 Å
α, β, γ90.000, 90.000, 120.000°
Cell volume180.120 Å3
Volume per atom15.010 Å3 atom−1
Formula units, Z1

Final Symmetry

Space groupP-6m2 (No. 187)
Crystal systemHexagonal
Point group-6m2
Hall symbolP -6 2
Pearson symbolhP12

Occupied Wyckoff Sites

SiteElementWyckoff positionMultiplicitySite symmetry
Sm1Sm1c1-6m2
Sm2Sm1d1-6m2
Fe1Fe6n6.m.
Fe2Fe1f1-6m2
Fe3Fe1e1-6m2
Fe4Fe1a1-6m2
Cu1Cu1b1-6m2

Prototype Relationship

Parent prototypeCaCu5-type (AB5)
Parent space groupP6/mmm (No. 191)
AFLOW ANRL labelAB5_hP6_191_a_cg-001

Cell Magnetization

Total spin moment20.467 μB cell−1
Moment per atom1.706 μB atom−1
Magnetization density0.114 μB Å−3
μ0M1.324 T
PAW-sphere total21.144 μB cell−1
Interstitial remainder-0.677 μB cell−1

Sublattice Magnetization

Rare-earth sublattice-0.566 μB
Transition-metal sublattice21.710 μB
RE–TM alignmentAntiparallel

Element-Resolved Moments

ElementAtomsPAW-sphere totalμBMean per atomμB atom−1RangeμB
Sm2-0.566-0.283-0.284 to -0.282
Fe921.5772.3972.377 to 2.404
Cu10.1330.1330.133 to 0.133

Site-Resolved PAW-Sphere Moments

SiteElementWyckoffsμBpμBdμBTotalμB
1Smc-0.025-0.032-0.225-0.282
2Smd-0.024-0.029-0.230-0.284
3Fen0.005-0.0242.4232.404
4Fen0.005-0.0242.4232.404
5Fen0.005-0.0242.4232.404
6Fen0.005-0.0242.4232.404
7Fen0.005-0.0242.4232.404
8Fen0.005-0.0242.4232.404
9Fef0.005-0.0182.4022.389
10Fee0.004-0.0412.4242.387
11Fea0.007-0.0392.4092.377
12Cub-0.013-0.0450.1910.133

Convex Hull: Sm-Fe-Cu

Energy above hull 0.064 eV/atom Reference set loading Candidates on this hull loading
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VASP Calculation

MethodCollinear spin-polarized DFT
Exchange-correlationPBE
Plane-wave cutoff520.0 eV
PrecisionNormal
Electronic convergence0.0001 eV
Ionic convergence-0.01 eV Å−1
Initial MAGMOM11*5.0 1*0.6
RelaxationIBRION 1, ISIF 3, NSW 100
View exact INCAR
ADDGRID = True
ALGO = Normal
EDIFF = 0.0001
EDIFFG = -0.01
ENCUT = 520.0
IBRION = 1
ISIF = 3
ISMEAR = 1
ISPIN = 2
LAECHG = False
LASPH = True
LCHARG = False
LMAXMIX = 6
LORBIT = 11
LREAL = Auto
LWAVE = False
MAGMOM = 11*5.0 1*0.6
NCORE = 4
NELM = 120
NSW = 100
POTIM = 0.2
PREC = Normal
SIGMA = 0.05

Brillouin-Zone Sampling

SchemeGamma
Mesh5 × 5 × 3
Maximum reciprocal spacing0.28617 Å−1
View exact KPOINTS
pymatgen with grid density = 1034 / number of atoms
0
Gamma
5 5 3

PAW Potentials

ElementVASP TITELZVALENMAXeV
SmPAW_PBE Sm_3 07Sep200011.000177.087
FePAW_PBE Fe_pv 06Sep200014.000293.238
CuPAW_PBE Cu_pv 06Sep200017.000368.605