MAGNETIC-ORDERING AND FRUSTRATION IN HEXAGONAL UNI4B

被引：87

作者：

MENTINK, SAM ^{[1
]}

DROST, A ^{[1
]}

NIEUWENHUYS, GJ ^{[1
]}

FRIKKEE, E ^{[1
]}

MENOVSKY, AA ^{[1
]}

MYDOSH, JA ^{[1
]}

机构：

[1] NETHERLANDS ENERGY RES FDN,1755 ZG PETTEN,NETHERLANDS

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.73.1031

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have determined unusual magnetic ordering of the hexagonal intermetallic uranium compound UN(i4)B via neutron diffraction. In the easy basal plane the U moments have triangular symmetry with antiferromagnetic interactions. Along the hard c axis ferromagnetic coupling occurs. Below T(N) = 20 K only two out of every three U moments of 1.2 mu(B) order in vortexlike arrangements around the third paramagnetic spin. This novel magnetic structure is related to the occurrence of a crystallographic superstructure. Previously observed anomalies in bulk properties below T(N) are attributed to unconventional spin-wave excitations associated with this type of ordering.

引用

页码：1031 / 1034

页数：4

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