Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Carlos Castilla Becerra"'
Autor:
M. S. Torikachvili, V. B. Barbeta, Priscila Rosa, R. F. Jardim, S. H. Masunaga, Carlos Castilla Becerra, Zachary Fisk
Publikováno v:
Physical Review Materials. 2
Magnetic properties of dilute single crystals of ${\mathrm{Gd}}_{1\ensuremath{-}x}{\mathrm{Y}}_{x}{\mathrm{B}}_{4}$ ($x=0$, 0.2, and 0.4) were systematically studied. These antiferromagnetic Shastry-Sutherland compounds display a remnant magnetizatio
Publikováno v:
Journal of Magnetism and Magnetic Materials. 374:307-310
From magnetization and ac susceptibility measurements we obtain the complete magnetic phase diagram of single crystals of Cs 2 FeCl 5 ·H 2 O for magnetic field up to 15 T. The magnetic field was applied along the directions parallel and perpendicula
Autor:
Armando Paduan-Filho, Ana Maria da Costa Ferreira, Regina Helena de Almeida Santos, Wendel A. Alves, Carlos Castilla Becerra, Antonio Carlos Borin
Publikováno v:
Inorganica Chimica Acta. 357:2269-2278
Magnetic interactions in binuclear copper(II) complexes, [Cu2(apyhist)2Cl2](ClO4)2 (1) and [Cu2(2-pyhist)2Cl2](ClO4)2 (2) with tridentate diimine ligands and chloro-bridged groups (where apyhist=(4-imidazolyl)ethylene-2-amino-1-ethylpyridine and 2-py
Autor:
Saulo Afonso de Almeida-Filho, Ana Maria da Costa Ferreira, Armando Paduan-Filho, Wendel A. Alves, Carlos Castilla Becerra, Mauro V. de Almeida
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 198:63-75
Comparative kinetic studies on the catalytic activity of some new dinuclear copper(II) complexes in the oxidation of phenolic and catechol substrates are reported. These complexes, showing a tri- or tetradentate imine ligand containing an imidazole g
Publikováno v:
Journal of Magnetism and Magnetic Materials. 261:161-165
The temperature dependence of the AC susceptibility ( χ ) at constant applied magnetic field was investigated in the paramagnetic region close to the ferromagnetic transition in MnP. Above the curie temperature ( T c =291.9 K), a maximum in the χ (
Publikováno v:
Physical Review B. 62:8965-8968
Publikováno v:
Journal of Physics: Condensed Matter. 12:6207-6215
We report on the magnetic effects induced by the substitution of Mn 2+ ions in the quasi-one-dimensional Heisenberg-like antiferromagnet compound (CH 3 ) 2 NH 3 MnCl 3 .2H 2 O by non-magnetic Cd 2+ and magnetic Cu 2+ ions. In the undiluted compound t
Autor:
Carlos Castilla Becerra, Fernando Palacio, Javier Campo, Armando Paduan-Filho, M. Carmen Morón
Publikováno v:
International Journal of Modern Physics B. 12:1781-1793
The phase diagram of low anisotropy antiferromagnets contains regions where small perturbations in the structure can induce rich interesting physical phenomenology that is still to be fully understood. This paper reviews the anomalies observed in sit
Autor:
Armando Paduan-Filho, Javier Campo, V. B. Barbeta, Carlos Castilla Becerra, M Gabas, Fernando Palacio
Publikováno v:
Physical Review B. 56:3204-3211
Low-anisotropy antiferromagnetic compounds of the general formula ${A}_{2}$Fe${}_{1\ensuremath{-}x}$In${}_{x}$Cl${}_{5}\ensuremath{\cdot}$H${}_{2}$O $(A=$K,Rb) exhibit a net spontaneous magnetization below their transition temperature ${(T}_{N})$ whe
Autor:
Mercedes Gabás, Carlos Castilla Becerra, Fernando Palacio, V. B. Barbeta, Armando Paduan-Filho, Javier Campo
Publikováno v:
Physical Review B. 56:3196-3203
The observation of remanent magnetization ${M}_{r}$ in single crystals of the easy-axis low-anisotropy antiferromagnet Rb${}_{2}$FeCl${}_{5}\ensuremath{\cdot}$H${}_{2}$O and in its site-diluted solid solutions Rb${}_{2}$Fe${}_{1\ensuremath{-}x}$In${}