Magnetic Properties of Hydrogen-Included TiZrNiPd Quasicrystals

Abstract

Quasicrystals prepared by rapid quenching of Pd-added TiZrNi ingots were hydrogenated, andeffects of hydrogen for magnetic properties were compared with the unhydrogenated ones undermagnetic fields from −10000 to 10000 Oe. The magnetization values obtained from vibrating sam-ple magnetometer (VSM) were analyzed with the combination of powder X-ray diffraction (XRD)data. While its contribution is larger than that of Pd, hydrogen decreases the magnetic moments ofboth Pd-doped and undoped quasicrystals. As increasing the amount of absorbed hydrogen whichis represented by H/M (hydrogen to host metal atom ratio) values from 0 to 1.19, the magnetizationvalues of Ti53Zr27Ni20 quasicrystals measured at 10000 Oe significantly decreased from 0.301 to0.212 emu/g. A careful analysis of XRD data demonstrated that the reduced interactions of mag-netic dipole moments between Ni atoms, as the product of the expansion of the quasilattice con-stants after hydrogenation, are responsible for the decreased magnetization values in hydrogenatedTiZrNiPd quasicrystal samples