Experimental evidence for two-dimensional magnetic order in proton bombarded graphite

被引：102

作者：

Barzola-Quiquia, J. ^{[1
]}

Esquinazi, P. ^{[1
]}

Rothermel, M. ^{[1
]}

Spemann, D. ^{[1
]}

Butz, T. ^{[1
]}

Garcia, N. ^{[2
]}

机构：

[1] Univ Leipzig, Inst Expt Phys 2, D-04103 Leipzig, Germany

[2] Consejo Super Invest Cientif, Lab Fis Sistemas Pequenos & Nanotecnol, E-28006 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.76.161403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have bombarded graphite samples with protons at low temperatures and low fluences to attenuate the large thermal annealing produced during irradiation. The overall optimization of sample handling allowed us to find Curie temperatures T-c greater than or similar to 350 K at the fluences used. The magnetization versus temperature shows unequivocally a linear dependence, which can be interpreted as due to excitations of spin waves in a two-dimensional Heisenberg model with a weak uniaxial anisotropy.

引用

页数：4

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