Hydrogen in R 2 Fe 17 intermetallic compounds: Structural, thermodynamic, and magnetic properties

摘要: The absorption and diffusion behavior of hydrogen in iron-rich rare-earth intermetallics the type R{sub 2}Fe{sub 17} (R=Y, Sm, Gd) resulting changes their magnetic properties are investigated. Intermediate concentration indicate solid-solution character hydrides. From equilibrium nonequilibrium experiments net reaction energies, bulk constants, surface barrier energies for Sm{sub determined discussed. low-temperature quantum is discussed hydride corresponding nitride. interstitial modification drastically crystalline electric field intermetallics. For 17}H{sub 4} electric-field parameter A{sub 20}=110 Ka{sub 0}{sup {minus}2} estimated from anisotropy constants K{sub 1} 2}. {copyright} {ital 1997} American Physical Society}