نتایج جستجو برای: pyrochlore
تعداد نتایج: 1161 فیلتر نتایج به سال:
The magnetic behavior of polycrystalline samples of Er(2)Ir(2)O(7) and Tb(2)Ir(2)O(7) pyrochlores is studied by magnetization measurements and neutron diffraction. Both compounds undergo a magnetic transition at 140 and 130 K, respectively, associated with an ordering of the Ir sublattice, signaled by thermomagnetic hysteresis. In Tb(2)Ir(2)O(7), we show that the Ir molecular field leads the Tb...
Two geometrically frustrated pyrochlore stannates, undergoing long range magnetic order below 1 K, were investigated at very low temperature. Anomalies in the behaviour of hyperfine quantities are found, by 155Gd Mössbauer spectroscopy in Gd2Sn2O7 and by low temperature specific heat measurements in Tb2Sn2O7. They are interpreted in terms of fluctuations of the correlated Gd or Tb spins, using ...
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