Magnetic anisotropy variations and nonequilibrium tunneling in a cobalt nanoparticle -: art. no. 226801

被引：53

作者：

Deshmukh, MM ^{[1
]}

Kleff, S

Guéron, S

Bonet, E

Pasupathy, AN

von Delft, J

Ralph, DC

机构：

[1] Cornell Univ, Lab Atom & Solid State Phys, Ithaca, NY 14853 USA

[2] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France

[3] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany

[4] Univ Munich, D-80333 Munich, Germany

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.87.226801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present detailed measurements of the discrete electron-tunneling level spectrum within nanometer-scale cobalt particles as a function of magnetic field and gate voltage, in this way probing individual quantum many-body eigenstates inside ferromagnetic samples. Variations among the observed levels indicate that different quantum states within one particle are subject to different magnetic anisotropy energies. Gate-voltage studies demonstrate that the low-energy tunneling spectrum is affected dramatically by the presence of nonequilibrium spin excitations.

引用

页码：art. no. / 226801

页数：4

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