The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni2In-Type MnCoGe1−xLax (x = 0, 0.01, 0.03) Alloys
Abstract
:1. Introduction
2. Experimental Method
3. Results and Discussion
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Compounds | MnCoGe | MnCoGe0.99La0.01 | MnCoGe0.97La0.03 |
---|---|---|---|
Space group | P63/mmc (194) | ||
Radiation | CuKα | ||
Unit cell parameters | |||
a/(Å) | 4.0641(1) | 4.0648(1) | 4.0695(1) |
b/(Å) | 4.0641(1) | 4.0648(1) | 4.0695(1) |
c/(Å) | 5.2882(2) | 5.2905(2) | 5.2980(2) |
Lattice volume V(Å3) | 87.337(5) | 87.430(7) | 87.761(2) |
Reliability factors | |||
Rp (%) | 12.9 | 13.3 | 13.0 |
RWP (%) | 15.5 | 15.7 | 15.7 |
Rexp (%) | 5.14 | 4.96 | 4.96 |
Doping Content x | Atoms | Site Occupation | x | y | z | Occupancy |
---|---|---|---|---|---|---|
0 | Mn | 2a | 0 | 0 | 0 | 1 |
Co | 2d | 1/3 | 2/3 | 3/4 | 1 | |
Ge | 2c | 1/3 | 2/3 | 1/4 | 1 | |
0.01 | Mn | 2a | 0 | 0 | 0 | 1 |
Co | 2d | 1/3 | 2/3 | 3/4 | 1 | |
M1 * | 2c | 1/3 | 2/3 | 1/4 | 0.993Ge + 0.007La | |
0.03 | Mn | 2a | 0 | 0 | 0 | 1 |
Co | 2d | 1/3 | 2/3 | 3/4 | 1 | |
M2 ** | 2c | 1/3 | 2/3 | 1/4 | 0.976Ge + 0.024La |
Central Atom | Connected to the Atom | Atomic Number | Distance (Å) | ||
---|---|---|---|---|---|
0 | 0.01 | 0.03 | |||
Mn | Mn | 2 | 2.6441(10) | 2.6453(10) | 2.6490(10) |
Co | 6 | 2.6930(7) | 2.6937(8) | 2.6970(8) | |
Ge/M1/M2 | 6 | 2.6930(7) | 2.6937(8) | 2.6970(8) | |
Co | Mn | 6 | 2.6930(7) | 2.6937(8) | 2.6970(8) |
Ge/M1/M2 | 5 | 2.3462(6) | 2.3466(8) | 2.3493(8) | |
Ge/M1/M2 | Mn | 6 | 2.6930(7) | 2.6937(8) | 2.6970(8) |
Co | 5 | 2.3462(6) | 2.3466(8) | 2.3493(8) |
Doping Content x | TC/K | θC/K | C | Effective Magnetic Moment/(μB/Formula) |
---|---|---|---|---|
0 | 294 | 300.36(2) | 0.0181(2) | 5.20 |
0.01 | 281 | 291.36(5) | 0.0179(2) | 5.17 |
0.03 | 278 | 289.97(3) | 0.0174(3) | 5.12 |
Materials | Magnetic Field/T | Tpk/K | RC/J·kg−1 | δTFWHM | Reference | |
---|---|---|---|---|---|---|
MnCoGe | 1 | 1.24 | 281 | 38.44 | 31 | This work |
1.5 | 1.64 | 281 | 60.68 | 37 | ||
MnCoGe0.99La0.01 | 1 | 1.13 | 279 | 36.16 | 32 | This work |
1.5 | 1.52 | 279 | 59.28 | 39 | ||
MnCoGe0.97La0.03 | 1 | 1.16 | 279 | 34.80 | 30 | This work |
1.5 | 1.56 | 279 | 57.72 | 37 | ||
MnCoGe0.5Si0.5 | 5 | 4.4 | 373 | 282 | 96 | [34] |
Mn0.97Fe0.03CoGe | 5 | 9 | 276 | 221 | 31 | [35] |
Mn0.96Fe0.04CoGe | 5 | 5 | 247 | 261 | 28 | [35] |
Gd5Si2Ge2 | 5 | 5.8 | 300 | 305 | / | [36] |
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Bi, Y.; He, W.; Yang, T.; Wu, W.; Wen, J.; Yu, X.; Chen, F. The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni2In-Type MnCoGe1−xLax (x = 0, 0.01, 0.03) Alloys. Materials 2021, 14, 3998. https://doi.org/10.3390/ma14143998
Bi Y, He W, Yang T, Wu W, Wen J, Yu X, Chen F. The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni2In-Type MnCoGe1−xLax (x = 0, 0.01, 0.03) Alloys. Materials. 2021; 14(14):3998. https://doi.org/10.3390/ma14143998
Chicago/Turabian StyleBi, Yifei, Wei He, Tonghan Yang, Weining Wu, Jingxian Wen, Xi Yu, and Feikuo Chen. 2021. "The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni2In-Type MnCoGe1−xLax (x = 0, 0.01, 0.03) Alloys" Materials 14, no. 14: 3998. https://doi.org/10.3390/ma14143998