Invar behaviour of Y2Fe17 and YFe11Ti single crystals: magnetic moment of Fe under pressure

Effect of pressure and interstitial atoms on magnetic properties of LuFe11Ti Intermetallics

“…Magnetisation M S of LuFe 11 Ti decreases under pressure with dln M=dp ¼ À0.026 GPa À1 at 5 K and À0.041 GPa À1 at 300 K. The values of dln M=dp are well comparable with ones of the other RFe 11 Ti intermetallics (R ¼Y, Dy, Ho) [7,9]. The pressure induced decrease of M S of LuFe 11 Ti is adequate to the increase of M S of the LuFe 11 TiH and the LuFe 11 TiN intermetallics caused by increased volume of unit cell [4,6], see Figure 1.…”

“…The dependence of magnetisation M S on volume of the crystal unit cell V of the LuFe 11 Ti and its hydride and nitride is compared with one of the YFe 11 Ti [4,5,7,9] in Figure 1. It seems to be clear that the increase of the Fe-moment with increasing V can be ascribed dominantly to a change of width and=or a polarisation of the d-band caused by the increasing volume.…”

“…Pressure experiments offer an advantage to study the magnetovolume effects without any additional dirty effects. A decrease of Fe-moment and pronounced changes of magnetocrystalline anisotropy in R(FeM) 12 intermetallics under pressure have been presented recently [7][8][9]. To contribute to a more precise description of the volume effects in the Fe-sublattice of the intermetallics, we have studied the LuFe 11 Ti intermetallics with non-magnetic R-element under high pressure.…”

The magnetocrystalline anisotropy in Y(Fe,Co)11TiH single crystals

“…Upon hydrogenation of YFe 11−x Co x Ti an increase in the interatomic spacings and changes in the electron structure of the compounds take place. Experimental data on the pressure effect on the anisotropy constant K 1 of YFe 11 Ti show that ∂K 1 /∂p is close to zero [16], i.e. the magnetovolume effect is negligible for the transition-metal sublattice.…”

Giant volume magnetostriction in the Y2Fe17 single crystal at room temperature

“…33 The exchange integral variation with the change of the unit cell volume was found by (18). According to the fact that T C is proportional to the exchange integral A between the Fe atoms, it follows:…”