Enhancement of magnetic fluctuations on passing below Tc in the heavy fermion superconductor UPd2Al3

被引：102

作者：

Bernhoeft, N

Sato, N

Roessli, B

Aso, N

Hiess, A

Lander, GH

Endoh, Y

Komatsubara, T

机构：

[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 98077, Japan

[3] Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[4] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[5] European Commiss, JRC, Inst Transuranium Elements, D-76125 Karlsruhe, Germany

[6] Tohoku Univ, Sendai, Miyagi 98077, Japan

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.81.4244

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The heavy fermion superconductor UPd2Al3 exhibits the unusual combination of an antiferromagnetic phase transition, at T-N = 14.3 K, followed by a superconducting phase transition below 2 K without destruction of the ordered magnetic moment. Polarized inelastic neutron scattering reveals the presence of two coupled modes, both transverse to the sublattice magnetization. On Passing into the superconducting phase an abrupt change is observed in the magnetic inelastic response. We show that it is reasonable to consider the superconducting state as arising out of interactions between quasiparticles which are strongly renormalized by the low-frequency exchange field.

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页码：4244 / 4247

页数：4

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