Table 1 Unit cell parameters of TmFe11Ti-(H,N).

From: ThMn12-type phases for magnets with low rare-earth content: Crystal-field analysis of the full magnetization process

Compound

a, nm

c, nm

V, nm3

ΔV/V,%

TmFe11Ti

8.4655

4.7794

342.5

0

TmFe11TiH0.9

8.5013

4.7790

345.4

0.8

TmFe11TiH1

8.5053

4.7789

345.7

0.9

TmFe11TiH1.1

8.5093

4.7789

346.0

1

TmFe11TiN1

8.5542

4.8157

352.4

2.8

  1. One can see that hydrogenation leads to an increase of the a parameter while c slightly decreases. Volume expansion of the hydrides does not exceed 1%. Nitrogenation increases the relative unit cell volume ΔV/V by 3%.
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