Evidence for core-shell magnetic behavior in antiferromagnetic Co3O4 nanowires

被引：162

作者：

Benitez, M. J. ^{[1
,2
]}

Petracic, O. ^{[1
]}

Salabas, E. L. ^{[2
]}

Radu, F. ^{[3
]}

Tueysuez, H. ^{[2
]}

Schueth, F. ^{[2
]}

Zabel, H. ^{[1
]}

机构：

[1] Ruhr Univ Bochum, Inst Expt Phys Festkorperphys, D-44780 Bochum, Germany

[2] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany

[3] BESSY, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.101.097206

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Employing magnetometry measurements, we have studied Co3O4 nanowires focusing on the core-shell behavior. We find two magnetic contributions, i.e., a regular antiferromagnetic and an additional irreversible one. The first contribution can be attributed to the antiferromagnetically ordered wire cores. The nature of the second one can be identified using thermoremanent and isothermoremanent magnetizaton curves as magnetic fingerprints of the irreversible magnetization. We conclude that the nanowire shell behaves like a two-dimensional diluted antiferromagnet in a field.

引用

页数：4

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