Direct evidence of antiferromagnetic exchange interaction in Fe(001) films: Strong magnon softening at the high-symmetry (M)over-bar point

被引：18

作者：

Meng, Y. ^{[1
]}

Zakeri, Kh ^{[1
]}

Ernst, A. ^{[1
,2
]}

Chuang, T. -H. ^{[1
]}

Qin, H. J. ^{[1
]}

Chen, Y. -J. ^{[1
]}

Kirschner, J. ^{[1
,3
]}

机构：

[1] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany

[2] Univ Leipzig, Wilhelm Ostwald Inst Phys & Theoret Chem, D-04103 Leipzig, Germany

[3] Univ Halle Wittenberg, Inst Phys, D-06120 Halle, Germany

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 17期

关键词：

ULTRATHIN FE FILMS; SPIN; SURFACES; ORDER;

D O I：

10.1103/PhysRevB.90.174437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the direct observation of a large unusual antiferromagnetic exchange interaction in Fe(001) films. By measuring the magnon dispersion relation over the entire Brillouin zone of an ultrathin Fe(001) film on Rh(001), we demonstrate that the signature of this unusual antiferromagnetic exchange interaction can be observed at the high-symmetry (M) over bar point. The exchange parameters are quantified by comparing the measured magnon dispersion relation with the results of our first-principles calculations. We suggest a way of examining the existence of an antiferromagnetic exchange interaction in layered magnetic structures and also a way of quantifying its strength.

引用

页数：7

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