Zobrazeno 1 - 10
of 453
pro vyhledávání: '"Rakoto, H"'
Publikováno v:
Phys. Rev. B 80, 012406 (2007)
Pulsed field magnetization experiments extend the typical metamagnetic staircase of CuFeO2 up to 58 T to reveal an additional first order phase transition at high field for both the parallel and perpendicular field configuration. Virtually complete i
Externí odkaz:
http://arxiv.org/abs/0907.4888
Autor:
Banks, M. G., Kremer, R. K., Hoch, C., Simon, A., Ouladdiaf, B., Broto, J. -M., Rakoto, H., Lee, C., Whangbo, M. -H.
We report a detailed examination the magnetic structure of anhydrous cupric chloride CuCl2 carried out by powder neutron diffraction, magnetic susceptibility and specific heat measurements on polycrystalline and single crystal samples as well as an e
Externí odkaz:
http://arxiv.org/abs/0904.2929
Autor:
Silva, N. J. O., Millan, A., Palacio, F., Kampert, E., Zeitler, U., Rakoto, H., Amaral, V. S.
We show that antiferromagnetic susceptibility in ferritin increases with temperature between 4.2 K and 180 K (i. e. below the N\'{e}el temperature) when taken as the derivative of the magnetization at high fields ($30\times10^4$ Oe). This behavior co
Externí odkaz:
http://arxiv.org/abs/0902.0929
Publikováno v:
Phys. Rev. B 79, 205314 (2009)
We find that the polarization field, B_chi, obtained by scaling the weak-parallel-field magnetoresistance at different electron densities in a dilute two-dimensional electron system in (111) silicon, corresponds to the spin susceptibility that grows
Externí odkaz:
http://arxiv.org/abs/0902.0887
Autor:
Knafo, W., Meingast, C., Sakarya, S., van Dijk, N. H., Huang, Y., Rakoto, H., Broto, J. -M., Löhneysen, H. v.
Publikováno v:
J. Phys. Soc. Jpn. 78 (2009) 043707
The weak itinerant ferromagnet UIr is studied by magnetization and magnetostriction measurements. Critical behavior, which surprisingly extends up to several Tesla, is observed at the Curie temperature $T_C\simeq45$ K and is analyzed using Arrott and
Externí odkaz:
http://arxiv.org/abs/0807.4411
Autor:
Kim, J. S., Xie, W. -H., Kremer, R. K., Babizhetskyy, V., Jepsen, O., Simon, A., Ahn, K. S., Raquet, B., Rakoto, H., Broto, J. -M., Ouladdiaf, B.
We present the results of a crystal structure determination using neutron powder diffraction as well as the superconducting properties of the rare-earth sesquicarbide La2C3 (Tc ~ 13.4 K) by means of specific heat and upper critical field measurements
Externí odkaz:
http://arxiv.org/abs/cond-mat/0703279
Autor:
Mennerich, C., Klauss, H. -H., Wolter, A. U. B., Süllow, S., Litterst, F. J., Golze, C., Klingeler, R., Kataev, V., B"uchner, B., Goiran, M., Rakoto, H., Broto, J. -M., Kataeva, O., Price, D. J.
In this paper we demonstrate the application of high magnetic fields to study the magnetic properties of low dimensional spin systems. We present a case study on the series of 2-leg spin-ladder compounds Na$_2$T$_2$(C$_2$O$_4$)$_3$(H$_2$O)$_2$ with T
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701575
Publikováno v:
Phys. Rev. B 73, 220403(R) (2006)
We consider the spin-1/2 antiferromagnetic Heisenberg chain in a staggered magnetic field describing materials such as copper benzoate and copper pyrimidine dinitrate. Using the density-matrix renormalization group for transfer matrices (TMRG) we cal
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610503
Publikováno v:
J. Phys. Cond. Mat 19 (2007) 145227
We have investigated the high field magnetisation of the frustrated one dimensional compound LiCuVO4. In zero field, LiCuVO4 undergoes long range antiferromagnetic order at T_{N} ~ 2.5 K with a broad short range Schottky type anomaly due to one dimen
Externí odkaz:
http://arxiv.org/abs/cond-mat/0608554
Autor:
Mennerich, C., Klauss, H. -H., Broekelmann, M., Litterst, F. J., Golze, C., Klingeler, R., Kataev, V., B"uchner, B., Grossjohann, S. -N., Brenig, W., Goiran, M., Rakoto, H., Broto, J. -M., Kataeva, O., Price, D. J.
We report the synthesis, crystal structure and magnetic properties of the S=1 2-leg spin-ladder compound Na_2Ni_2(C_2O_4)_3(H_2O)_2. The magnetic properties were examined by magnetic susceptibility and pulsed high field magnetization measurements. Th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0601305