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Dresden 2006 – scientific programme

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MA: Magnetismus

MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)

MA 20.136: Poster

Tuesday, March 28, 2006, 15:15–19:15, P1

Analysis of 55Mn and 69,71Ga-Spectra of LuMn6Ge6−xGax by means of NMR — •Richard Montbrun, Jens Schnelzer, and Elmar Dormann — Physikalisches Institut, Universität Karlsruhe (TH), D-76131 Karlsruhe

By varying the Ge:Ga ratio, the magnetic structure of the LuMn6Ge6−xGax samples (with HfFe6Ge6- type structure) experiences various ordering phenomena such as antiferromagnetic, helimagnetic or ferromagnetic structures. The effects of this doping are examined by means of low-temperature zero-field Nuclear Magnetic Resonance measurements . We present spectra covering the frequency range between 150 and 450 MHz and the effects of the variation of the excitation conditions as well as T2 resolved and corrected spectra. The NMR observations can be related to the changes in the magnetic structure.
We thank G. Venturini, Nancy, for providing the samples.

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