STUDIES OF THE MAGNETIC PHASE-DIAGRAM OF THE U(NI1-XCUX)(2)SI-2 SYSTEM

被引：5
|
作者：
KUZNIETZ, M [1 ]
ANDRE, G [1 ]
BOUREE, F [1 ]
PINTO, H [1 ]
ETTEDGUI, H [1 ]
MELAMUD, M [1 ]
机构：
[1] CENS,LAB LEON BRILLOUIN,CNRS,F-91191 GIF SUR YVETTE,FRANCE
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1995年 / 219卷
关键词：
ACTINIDES; NEUTRON DIFFRACTION; A.C; SUSCEPTIBILITY; MAGNETIC STRUCTURES; MAGNETIC PHASE DIAGRAMS;
D O I：
10.1016/0925-8388(94)05056-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Polycrystalline U(Ni1-xCux)(2)Si-2 solid solutions have a tetragonal ThCr2Si2 type crystal structure. Antiferromagnetic (AF) transitions, observed by measurements of a.c. susceptibility for x=0.10, 0.25, and 0.50, are confirmed by neutron diffraction. The AF structures are of type I (+-+-) with k=(0,0,1) below T-0=108+/-5 K for x=0.10 (with a possible incommensurate phase at 108-135 K), T-N=151+/-3 K for x=0.25, and T-N=150+/-2 K for x=0.50. The a.c. susceptibility transition for x=0.75 is associated with the three magnetic structures observed by neutron diffraction: AF I, ferrimagnetic (++-) and AF IA (++--), with k=(0,0,1), (0,0,2/3) and (0,0,1/2), and T-N=120+/-3, 115+/-4 and 110+/-3 K respectively. Including previous neutron results on single-crystal UNi2Si2 and powdered UCu2Si2, a magnetic phase diagram of the U(Ni1-xCux)(2)Si-2 system is proposed and discussed.
引用
收藏
页码：244 / 247
页数：4
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