TY - JOUR
T1 - Inelastic neutron scattering study of crystal field levels in Pr Os4 As12
AU - Chi, Songxue
AU - Dai, Pengcheng
AU - Barnes, T.
AU - Kang, H. J.
AU - Lynn, J. W.
AU - Bewley, R.
AU - Ye, F.
AU - Maple, M. B.
AU - Henkie, Z.
AU - Pietraszko, A.
PY - 2008/3/25
Y1 - 2008/3/25
N2 - We use neutron scattering to study the Pr3+ crystalline electric field (CEF) excitations in the filled skutterudite Pr Os4 As12. By comparing the observed levels and their strengths under neutron excitation with the theoretical spectrum and neutron excitation intensities, we identify the Pr3+ CEF levels and show that the ground state is a magnetic Γ4 (2) triplet, and the excited states Γ1, Γ4 (1), and Γ23 are at 0.4, 13, and 23 meV, respectively. A comparison of the observed CEF levels in Pr Os4 As12 with the heavy fermion superconductor Pr Os4 Sb12 reveals the microscopic origin of the differences in the ground states of these two filled skutterudites.
AB - We use neutron scattering to study the Pr3+ crystalline electric field (CEF) excitations in the filled skutterudite Pr Os4 As12. By comparing the observed levels and their strengths under neutron excitation with the theoretical spectrum and neutron excitation intensities, we identify the Pr3+ CEF levels and show that the ground state is a magnetic Γ4 (2) triplet, and the excited states Γ1, Γ4 (1), and Γ23 are at 0.4, 13, and 23 meV, respectively. A comparison of the observed CEF levels in Pr Os4 As12 with the heavy fermion superconductor Pr Os4 Sb12 reveals the microscopic origin of the differences in the ground states of these two filled skutterudites.
UR - http://www.scopus.com/inward/record.url?scp=41549090838&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.77.094428
DO - 10.1103/PhysRevB.77.094428
M3 - Article
AN - SCOPUS:41549090838
SN - 1098-0121
VL - 77
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 094428
ER -