SHORT-RANGE MAGNETIC-ORDERING IN THE HIGHLY FRUSTRATED PYROCHLORE Y2MN2O7

被引：125

作者：

REIMERS, JN

GREEDAN, JE

KREMER, RK

GMELIN, E

SUBRAMANIAN, MA

机构：

[1] MCMASTER UNIV,MCMASTER NUCL REACTOR,HAMILTON L8S 4M1,ONTARIO,CANADA

[2] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART 80,GERMANY

[3] DUPONT CO,EXPT STN,WILMINGTON,DE 19898

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.43.3387

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The bulk magnetic susceptibility of Y2Mn2O7 is suggestive of ferromagnetic order, with THETA-C = +41(2) K, and an apparent T(c) = 20 K. However, both dc and ac susceptibility data show a broad maximum near 7 K, which is frequency and field dependent. Heat-capacity studies down to 2 K show no evidence for long-range magnetic order. Neutron-scattering data indicate the presence of both antiferromagnetic (first neighbors) and ferromagnetic (second and third neighbors) short-range correlations. These results are compared to mean-field-theory predictions for the highly frustrated 16c sites in the pyrochlore lattice. This material shows many properties in common with spin glasses in spite of the fact that there is no evidence for chemical disorder.

引用

页码：3387 / 3394

页数：8

共 25 条

[1] VERY LOW FIELD SUSCEPTIBILITY OF THE HIGHLY FRUSTRATED CSMNFEF6 AND CSNIFEF6 COMPOUNDS [J].