Zobrazeno 1 - 10
of 1 108
pro vyhledávání: '"Butz, T."'
A user-friendly fully digital TDPAC-spectrometer with six detectors and fast digitizers using Field Programmable Gate Arrays is described and performance data are given.
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A33061
https://ul.qucosa.de/api/qucosa%3A33061/attachment/ATT-0/
https://ul.qucosa.de/api/qucosa%3A33061/attachment/ATT-0/
Autor:
Das, S. K., Guin, R., Banerjee, D., Das, P., Butz, T., Amaral, V. S., Correia, J. G., Barbosa, M. B.
30 keV 111mCd and 50 keV 199mHg beams from ISOLDE were used to implant on preformed target of C60 with the thickness of 1 mg/cm2. Endofullerene compounds, viz.,111mCd@C60 and 199mHg@C60 formed during implantation were separated by filtration through
Externí odkaz:
http://arxiv.org/abs/1307.7818
Autor:
Gonçalves, J. N., Stroppa, A., Correia, J. G., Butz, T., Picozzi, S., Fenta, A. S., Amaral, V. S.
Publikováno v:
Phys. Rev. B 86, 035145 (2012)
The hyperfine interaction between the quadrupole moment of atomic nuclei and the electric field gradient (EFG) provides information on the electronic charge distribution close to a given atomic site. In ferroelectric materials, the loss of inversion
Externí odkaz:
http://arxiv.org/abs/1203.1306
We present a x-ray dichroism study of graphite surfaces that addresses the origin and magnitude of ferromagnetism in metal-free carbon. We find that, in addition to carbon $\pi$ states, also hydrogen-mediated electronic states exhibit a net spin pola
Externí odkaz:
http://arxiv.org/abs/0905.4315
Publikováno v:
Phys. Rev. B 80, 195402 (2009)
We investigate the dependence of the electrical resistivity of $\sim 60 $nm thick single crystalline graphite samples on the defect concentration produced by proton irradiation at very low fluences. We show that the resistivity decreases few percent
Externí odkaz:
http://arxiv.org/abs/0905.2945
Autor:
Esquinazi, P., Barzola-Quiquia, J., Spemann, D., Rothermel, M., Ohldag, H., García, N., Setzer, A., Butz, T.
We discuss recently obtained data using different experimental methods including magnetoresistance measurements that indicate the existence of metal-free high-temperature magnetic order in graphite. Intrinsic as well as extrinsic difficulties to trig
Externí odkaz:
http://arxiv.org/abs/0902.1671
Autor:
Talapatra, A., Das, S. K., Bandyopadhyay, S. K., Barat, P., Sen, Pintu, Rawat, R., Banerjee, A., Butz, T.
Measurements of the critical current density (Jc) by magnetization and the upper critical field (Hc2) by magnetoresistance have been performed for hafnium-doped MgB2. There has been a remarkable enhancement of Jc as compared to that by ion irradiatio
Externí odkaz:
http://arxiv.org/abs/0807.0135
We have prepared magnetic graphite samples bombarded by protons at low temperatures and low fluences to attenuate the large thermal annealing produced during irradiation. An overall optimization of sample handling allowed us to find Curie temperature
Externí odkaz:
http://arxiv.org/abs/0706.2442
Autor:
Barzola-Quiquia, J., Petriconi, S., Esquinazi, P., Rothermel, M., Spemann, D., Setzer, A., Butz, T.
In this work we have studied systematically the changes in the magnetic behavior of highly oriented pyrolytic graphite (HOPG) samples after proton irradiation in the MeV energy range. Superconducting quantum interferometer device (SQUID) results obta
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610293
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