Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Moodenbaugh, A R"'
We have successfully grown epitaxial La$_{1.67}$Sr$_{0.33}$NiO$_4$ films with a small crystalline mosaic using pulsed laser deposition. With synchrotron radiation, the x-ray diffraction peaks associated with charge stripes have been successfully obse
Externí odkaz:
http://arxiv.org/abs/0802.2119
Nb3Sn was prepared by milling Nb and Sn powder mixtures followed by limited reactions to restrict disorder recovery. Although disorder reduced the superconducting critical temperature Tc, the concomitant electron scattering increased the upper critic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511560
(Abridged abstract) Alloyed MgB2 differs from pure forms in that diffusion is needed to distribute the alloying elements homogeneously. Williamson-Hall analyses of x-ray diffraction peaks showed that Mg1-xAlxB2 samples made by a typical reaction A ha
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507041
Electron energy-loss spectroscopy (EELS) was combined with heat capacity measurements to follow the change of superconductivity with systematic Al doping of MgB$_2$. By using x-ray diffraction and Vegard's law to assess the actual Al content in the s
Externí odkaz:
http://arxiv.org/abs/cond-mat/0504463
Autor:
Park, S., Kang, K., Si, W., Yoon, W. -S., Lee, Y., Moodenbaugh, A. R., Lewis, L. H., Vogt, T.
We have prepared the oxyhydrate Na03RhO206H2O by extracting Na+ cations from NaRhO2 and intercalating water molecules using an aqueous solution of Na2S2O8. Synchrotron X-ray powder diffraction, thermogravimetric analysis (TGA), and energy-dispersive
Externí odkaz:
http://arxiv.org/abs/cond-mat/0504007
Publikováno v:
Phys. Rev. B 67, 184516 (2003)
The optical conductivity of La(2-x)Sr(x)NiO(4) has been interpreted in various ways, but so far the proposed interpretations have neglected the fact that the holes doped into the NiO(2) planes order in diagonal stripes, as established by neutron and
Externí odkaz:
http://arxiv.org/abs/cond-mat/0207003
Autor:
Zhu, Y., Wu, L., Volkov, V., Li, Q., Gu, G., Moodenbaugh, A. R., Malac, M., Suenaga, M., Tranquada, J.
We report a detailed study of the microstructure and defects in sintered polycrystalline MgB2. Both TEM and x-ray data reveal that MgO is the major second-phase in our bulk samples. Although MgB2 and MgO have different crystal symmetries, being P6/mm
Externí odkaz:
http://arxiv.org/abs/cond-mat/0105311
Autor:
Johnson, P. D., Valla, T., Fedorov, A., Yusof, Z., Wells, B. O., Li, Q., Moodenbaugh, A. R., Gu, G. D., Koshizuka, N., Kendziora, C., Jian, Sha, Hinks, D. G.
Publikováno v:
Phys. Rev. Lett. 87, 177007 (2001)
High-resolution photoemission is used to study the electronic structure of the cuprate superconductor, Bi2212, as a function of hole doping and temperature. A kink observed in the band dispersion in the nodal direction in the superconducting state is
Externí odkaz:
http://arxiv.org/abs/cond-mat/0102260
At low temperature the holes doped into the NiO(2) planes of La(2)NiO(4.133) by the excess oxygen collect in diagonal stripes that separate narrow antiferromagnetic domains. The magnetic order drops abruptly to zero at T_m = 110.5 K, but charge order
Externí odkaz:
http://arxiv.org/abs/cond-mat/9611091
Publikováno v:
Phys. Rev. B, Vol 53, p. 8207 (1996)
The dc resistivity, magnetoresistance and magnetic susceptibility of La(1-x)SrxCoO3 compounds have been investigated in the temperature range of 4K to 300K for magnetic fields up to 7 T. In the doping range studied (0.05 - x - 0.25) the electronic pr
Externí odkaz:
http://arxiv.org/abs/cond-mat/9609274