TY - JOUR
T1 - NMR study of ordered states in NpFe Ga5
T2 - Orbitally related ordering below 78 K
AU - Kambe, S.
AU - Sakai, H.
AU - Tokunaga, Y.
AU - Walstedt, R. E.
AU - Aoki, D.
AU - Homma, Y.
AU - Shiokawa, Y.
PY - 2007/10/29
Y1 - 2007/10/29
N2 - We report NMR studies on a single crystal of NpFe Ga5, which has the tetragonal HoCo Ga5 (115) structure and exhibits two antiferromagnetically ordered states. In the antiferromagnetic I phase below 118 K, the observed internal field at the Ga(2) (4i) site is consistent with the ordered structure revealed by neutron diffraction measurements. Below 78 K in the antiferromagnetic II phase, two different Ga(2) sites with different electric field gradient tensors appear, which indicates an orbitally related ordering. A possible quadrupolar ordering in the antiferromagnetic II phase is discussed.
AB - We report NMR studies on a single crystal of NpFe Ga5, which has the tetragonal HoCo Ga5 (115) structure and exhibits two antiferromagnetically ordered states. In the antiferromagnetic I phase below 118 K, the observed internal field at the Ga(2) (4i) site is consistent with the ordered structure revealed by neutron diffraction measurements. Below 78 K in the antiferromagnetic II phase, two different Ga(2) sites with different electric field gradient tensors appear, which indicates an orbitally related ordering. A possible quadrupolar ordering in the antiferromagnetic II phase is discussed.
UR - http://www.scopus.com/inward/record.url?scp=35648946926&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=35648946926&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.76.144433
DO - 10.1103/PhysRevB.76.144433
M3 - Article
AN - SCOPUS:35648946926
SN - 1098-0121
VL - 76
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 14
M1 - 144433
ER -