Abstract
By examining the Ho2Fe14B case, we explored the influence of substitution and absorption atoms on the high-field behavior of magnetization of rare-earth (R)-Fe intermetallics. The value of the first critical field shows that the inter-sublattice exchange interactions remain practically unchanged when the substitution takes place in the R sublattice (replacement of up to 50 % of Ho by Nd). On the contrary, hydrogen absorption by Ho2Fe14B and Ho1Nd1Fe14B of the maximum possible hydrogen concentration 5.5 at./f.u. decreases the strength of the R-Fe exchange by 30%. Remarkably, the influence of hydrogenation is stronger in the compound modified by substitution.
Highlights
Rare-earth (R)-iron intermetallics have a prominent role among magnetic materials ranging between daily life and space industry.[1,2,3,4,5,6] The interest in their fundamental properties does not wane in the context of emerging new as well as already implemented research methods, which still get further developed
Probing the exchange coupling in the complex modified Ho-Fe-B compounds by high-field magnetization measurements
The literature survey shows that for the compounds of the R2Fe14B family materials with R = Dy and Tm were studied using ultra-high magnetic fields up to 120 T.18. This field was sufficient to observe a fieldinduced ferromagnetism in Tm2Fe14B while for Dy2Fe14B fields exceeding 120 T were required
Summary
Rare-earth (R)-iron intermetallics have a prominent role among magnetic materials ranging between daily life and space industry.[1,2,3,4,5,6] The interest in their fundamental properties does not wane in the context of emerging new as well as already implemented research methods, which still get further developed (for instance, the high magnetic fields methodology[7,8]). Probing the exchange coupling in the complex modified Ho-Fe-B compounds by high-field magnetization measurements
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