Neutron scattering studies of order parameters and excitations in antiferro-quadrupolar phase of PrFe4P12

被引:21
作者
Hao, L
Iwasa, K [1 ]
Kuwahara, K
Kohgi, M
Sugawara, H
Aoki, Y
Sato, H
Matsuda, TD
Mignot, JM
Gukasov, A
Nishi, M
机构
[1] Tohoku Univ, Dept Phys, Aoba Ku, Sendai, Miyagi 9808578, Japan
[2] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1920397, Japan
[3] Univ Tokushima, Dept Math & Nat Sci, Tokushima 7708502, Japan
[4] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 319119, Japan
[5] CEA Saclay, CNRS, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France
[6] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
关键词
PrFe4P12; antiferro-quadrupolar ordering; neutron scattering;
D O I
10.1016/j.physb.2005.01.328
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The order parameters in the antiferro-quadrupolar (AFQ) ordered phase of PrFe4P12 have been investigated by polarized neutron diffraction measurement. By observing the interference effect of scattering amplitudes from the Fe-ion displacement and the antiferromagnetic component induced by the magnetic field applied along the [0,0,1] axis, we conclude that the dominant ordered quadrupole is O-2(0) in the low-temperature phase. By inelastic neutron scattering experiment for a single-crystal sample, we observed sharp magnetic excitations in the AFQ-ordered phase, whose maximum intensity appears at the Brillouin zone center and minimum at the zone boundary. This fact indicates the existence of ferromagnetic correlation between Pr ions in the AFQ-ordered phase. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:871 / 873
页数:3
相关论文
共 7 条
[1]   Anomalous heavy-fermion and ordered states in the filled skutterudite PrFe4P12 -: art. no. 064446 [J].
Aoki, Y ;
Namiki, T ;
Matsuda, TD ;
Abe, K ;
Sugawara, H ;
Sato, H .
PHYSICAL REVIEW B, 2002, 65 (06) :1-7
[2]  
Hao L, 2003, ACTA PHYS POL B, V34, P1113
[3]  
Iwasa K, 2003, ACTA PHYS POL B, V34, P1117
[4]   Crystal-structure modulation in the anomalous low-temperature phase of PrFe4P12 [J].
Iwasa, K ;
Watanabe, Y ;
Kuwahara, K ;
Kohgi, M ;
Sugawara, H ;
Matsuda, TD ;
Aoki, Y ;
Sato, H .
PHYSICA B-CONDENSED MATTER, 2002, 312 :834-836
[5]   Structural and magnetic properties of RFe4P12 (R=Pr, Nd) studied by neutron diffraction [J].
Keller, L ;
Fischer, P ;
Herrmannsdörfer, T ;
Dönni, A ;
Sugawara, H ;
Matsuda, TD ;
Abe, K ;
Aoki, Y ;
Sato, H .
JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 323 :516-519
[6]   Anomalous transport properties of RFe4P12 (R = La, Ce, Pr, and Nd) [J].
Sato, H ;
Abe, Y ;
Okada, H ;
Matsuda, TD ;
Abe, K ;
Sugawara, H ;
Aoki, Y .
PHYSICAL REVIEW B, 2000, 62 (22) :15125-15130
[7]   Exotic heavy-fermion state in the filled skutterudite PrFe4P12 uncovered by the de Haas-van Alphen effect -: art. no. 134411 [J].
Sugawara, H ;
Matsuda, TD ;
Abe, K ;
Aoki, Y ;
Sato, H ;
Nojiri, S ;
Inada, Y ;
Settai, R ;
Onuki, Y .
PHYSICAL REVIEW B, 2002, 66 (13) :1-5