Probing the exchange coupling in the complex modified Ho-Fe-B compounds by high-field magnetization measurementsстатья
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Аннотация: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.