An 166Er-Mossbauer Investigation of ErNiAl4
A low temperature 166Er-Mössbauer spectroscopy investigation of ErNiAl4 reveals that the Er3+ ion’s ground state Kramers doublet has ¦Jz¦ just 8% less than the fully-stretched value of J = 15/2. The persistence of a magnetically-split spectrum to well above TN = 5.8 K is consistent with Orbach type paramagnetic relaxation that proceeds via the third excited crystal field level.
Yuriy Verbovytskyy and António Pereira Gonçalves
D. H. Ryan et al., "An 166Er-Mossbauer Investigation of ErNiAl4", Solid State Phenomena, Vol. 194, pp. 84-87, 2013