132 citations · 413 across the 8 of their papers we have counts for
5 papers · 1 filter
Irreversible magnetization under rotating fields and lock-in effect on ErBa_2Cu_3O_7 single crystal with columnar defects
M. A. Avila, L. Civale, A. V. Silhanek +3
We have measured the irreversible magnetization M_i of an ErBa_2Cu_3O_7 single crystal with columnar defects (CD), using a technique based on sample rotation under a fixed magnetic…
Study of magnetic and specific heat measurements at low temperatures in Nd0.5Sr0.5MnO3 and Nd0.5Ca0.5MnO3
J. Lopez, P. N. Lisboa-Filho, O. F. de Lima +1
The magnetization at low temperatures for Nd0.5Sr0.5MnO3 and Nd0.5Ca0.5MnO3 samples showed a rapid increase with decreasing temperatures, contrary to a La0.5Ca0.5MnO3 sample. Speci…
Angular dependence of the bulk nucleation field Hc2 of aligned MgB2 crystallites
O. F. de Lima, C. A. Cardoso, R. A. Ribeiro +2
Studies on the new MgB2 superconductor, with a critical temperature Tc ~ 39 K, have evidenced its potential for applications although intense magnetic relaxation effects limit the…
Unusual magnetic relaxation behavior in La0.5Ca0.5MnO3 and Nd0.5Sr0.5MnO3
J. Lopez, P. N. Lisboa-Filho, W. A. C. Passos +5
We have carried out a systematic magnetic relaxation study, measured after applying and switching off a 5 T magnetic field to polycrystalline samples of La0.5Ca0.5MnO3 and Nd0.5Sr0…
Anisotropic superconducting properties of aligned MgB2 crystallites
O. F. de Lima, R. A. Ribeiro, M. A. Avila +2
Samples of aligned MgB2 crystallites have been prepared, allowing for the first time the direct identification of an upper critical field anisotropy Hc2^{ab}/Hc2^{c}= xi_{ab}/xi_{c…