TY - JOUR
T1 - Large crystalline fields and anisotropic vibrational modes of 151Eu2+ in metallic EuRu2Ge2
AU - Nowik, I.
AU - Felner, I.
PY - 1985/5
Y1 - 1985/5
N2 - Mössbauer studies of 151Eu2+ in EuRu2Ge2 at temperatures 4.1 to 600 K reveal the largest crystalline electric field gradient ever observed in a metallic rare earth compound, A2〈r2〉=425 K. The associated large quadropole interaction, eqQ=-440Mc/s, enabled a detailed study of the anisotropy in recoil free fraction, Goldanskii-Karyagin effect. While at 85 K the recoil free fractions along the crystallographic c-axis and perpendicular to it are 0.95 and 0.74, at 570 K they are 0.64 and 0.10, respectively. Within a Debye model this corresponds to Debye temperatures of θ|=450 K and θ⊥=180 K. This is the first observation of an anisotropic recoil free fraction in a metallic rare earth compound.
AB - Mössbauer studies of 151Eu2+ in EuRu2Ge2 at temperatures 4.1 to 600 K reveal the largest crystalline electric field gradient ever observed in a metallic rare earth compound, A2〈r2〉=425 K. The associated large quadropole interaction, eqQ=-440Mc/s, enabled a detailed study of the anisotropy in recoil free fraction, Goldanskii-Karyagin effect. While at 85 K the recoil free fractions along the crystallographic c-axis and perpendicular to it are 0.95 and 0.74, at 570 K they are 0.64 and 0.10, respectively. Within a Debye model this corresponds to Debye temperatures of θ|=450 K and θ⊥=180 K. This is the first observation of an anisotropic recoil free fraction in a metallic rare earth compound.
UR - http://www.scopus.com/inward/record.url?scp=25344454937&partnerID=8YFLogxK
U2 - 10.1016/0378-4363(85)90273-6
DO - 10.1016/0378-4363(85)90273-6
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AN - SCOPUS:25344454937
SN - 0378-4363
VL - 130
SP - 433
EP - 435
JO - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
JF - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
IS - 1-3
ER -