Zobrazeno 1 - 10
of 615
pro vyhledávání: '"Höhne R."'
In this work we have investigated the changes of the magnetic properties of highly oriented pyrolytic graphite samples after irradiation either with $\sim 3 \times 10^{14}$ protons or $ 3.5 \times 10^{13} ... 3.5 \times 10^{14}$ iron ions with energi
Externí odkaz:
http://arxiv.org/abs/0801.0850
Elemental carbon represents a fundamental building block of matter and the possibility of ferromagnetic order in carbon attracted widespread attention. However, the origin of magnetic order in such a light element is only poorly understood and has pu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0609478
Autor:
Esquinazi, P., Höhne, R., Han, K. -H., Spemann, D., Setzer, A., Diaconu, M., Schmidt, H., Butz, T.
In this chapter we review the magnetic effects produced by proton irradiation on graphite, disordered carbon and fullerene films. The advantage of proton irradiation is twofold: it enables us to make an impurity analysis simultaneously to the implant
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509519
In order to study a possible magnetic proximity effect in magnetite-carbon structures, we have performed magnetization measurements of graphite-magnetite composites with different mass ratios as well as the measurement of the magnetoresistance of one
Externí odkaz:
http://arxiv.org/abs/cond-mat/0409447
Publikováno v:
Phys. Rev. Letters 91, 227201 (2003)
We provide evidence that proton irradiation of energy 2.25 MeV on highly-oriented pyrolytic graphite samples triggers ferro- or ferrimagnetism. Measurements performed with a superconducting quantum interferometer device (SQUID) and magnetic force mic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0309128
Autor:
Esquinazi, P., Setzer, A., Hoehne, R., Semmelhack, C., Kopelevich, Y., Spemann, D., Butz, T., Kohlstrunk, B., Loesche, M.
Publikováno v:
Phys. Rev. B 66, 024429 (2002)
We have studied the magnetization of various, well characterized samples of highly oriented pyrolitic graphite (HOPG), Kish graphite and natural graphite to investigate the recently reported ferromagnetic-like signal and its possible relation to ferr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0203153
Autor:
Kempa, H., Kopelevich, Y., Mrowka, F., Setzer, A., Torres, J. H. S., Höhne, R., Esquinazi, P.
A magnetic-field-driven transition from metallic- to semiconducting-type behavior in the basal-plane resistance takes place in highly oriented pyrolytic graphite at a field $H_c \sim 1~$kOe applied along the hexagonal c-axis. The analysis of the data
Externí odkaz:
http://arxiv.org/abs/cond-mat/0005439
Publikováno v:
In Polymer Testing July 2016 52:184-191
Publikováno v:
In Journal of Magnetism and Magnetic Materials 2008 320(6):966-977
Autor:
Salzer, R., Spemann, D., Esquinazi, P., Höhne, R., Setzer, A., Schindler, K., Schmidt, H., Butz, T.
Publikováno v:
In Journal of Magnetism and Magnetic Materials 2007 317(1):53-60