Two-dimensional Ising behavior in c(2x2) antiferromagnetic Mn and Cr monolayers on Ag(001) -: art. no. 144419

被引：18

作者：

Hanf, MC ^{[1
]}

Krembel, C ^{[1
]}

Bolmont, D ^{[1
]}

Gewinner, G ^{[1
]}

机构：

[1] Univ Haute Alsace, CNRS, Unite Mixte Rech 7014, Fac Sci & Tech,Lab Phys & Spect Elect, F-68093 Mulhouse, France

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.68.144419

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic order M-S(T) is determined as a function of temperature for the c(2x2) antiferromagnetic monolayers of Mn and Cr on Ag(001), using the intensity of the coherent superlattice (1/2,1/2) reflections in low-energy electron diffraction to obtain the sublattice magnetization M-S. The data fit the Onsager-Yang theoretical result rather well for the spontaneous magnetization of the plane square lattice in the Ising model with critical temperatures T(C)approximate to198 and 462 K for Mn and Cr, respectively. Near T-C a fit to a universal power law M-S(T)similar to(1-T/T-C)(beta) confirms the two-dimensional Ising class with beta close to 1/8 and indicates the importance of second-order magnetic anisotropy in these two-dimensional antiferromagnets.

引用

页数：4

共 26 条

[1] Temperature and thickness dependence of magnetic moments in NiO epitaxial films [J].