Listar Ciencias Exactas y Naturales por tema "Estrutura magnética"

Mostrando ítems 1-5 de 5

    • Effect of composition and short-range order on the magnetic moments of Fe in Fe/sub 1-x/V/sub x/ alloys 

      Krause, Joao Carlos; Schaf, Jacob; Costa Junior, Moacir Indio da; Paduani, Clederson (2000) [Artículo de periódico]
      We report dc magnetization, Mössbauer spectroscopy, and x-ray-diffraction measurements on Fe₁₋xVx alloys, quenched or heat treated, with single phase bcc structure in the whole concetration range. It is well known that the ...

    • Magnetic dichroism in core-level photoemission from Gd(0001) 

      Morais, Jonder; Fecher, Gerhard H.; Denecke, Reinhard; Hussain, Zahid; Fadley, Charles S. (2000) [Artículo de periódico]
      This work reports on magnetic dichroism in photoemission from the Gd 4l(l=s,p,d, f) core level of in-plane magnetized Gd films excited with linearly, circularly, and unpolarized light. Thin Gd films of about 100 ML thickness ...

    • Specific heat and magnetic order in LaMnO/sub 3+[delta]/ 

      Ghivelder, Luis; Abrego-Castillo, Ildeman; Gusmao, Miguel Angelo Cavalheiro; Alonso, José Antônio; Cohen, Lesley F. (1999) [Artículo de periódico]
      Magnetic and specific-heat measurements are performed in three different samples of LaMnO₃₊[delta], with δ = 0.11, 0.15, and 0.26, presenting important disorder effects, such as carrier localization, due to high amounts ...

    • Suppression of magnetic ordering in quasi-one-dimensional FexCo1−xNb2O6 compounds 

      Sarvezuk, Paulo Willian Carvalho; Kinast, Eder Julio; Colin, C. V.; Gusmao, Miguel Angelo Cavalheiro; Cunha, Joao Batista Marimon da; Isnard, Olivier (2011) [Artículo de periódico]
      We present a systematic investigation of the series of compounds FexCo1−xNb2O6 by means of x-ray and neutron powder diffraction combined with magnetic measurements, carried out in the paramagnetic as well as in the ordered ...

    • Thermodynamic properties of an integrabel quantum spin ladder with boundary impurities 

      Batchelor, Murray T.; Guan, Xi-Wen; Foerster, Angela; Tonel, Arlei Prestes; Zhou, Huan-Qiang (2003) [Artículo de periódico]
      An integrable quantum spin ladder based on the SU(4) symmetry algebra with boundary defects is studied in the framework of boundary integrability. Five nontrivial solutions of the reflection equations lead to different ...