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首页> 外文期刊>Physica, B. Condensed Matter >Magnetic properties of R2WO6 (where R = Nd, Sm, Eu, Gd, Dy and Ho)
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Magnetic properties of R2WO6 (where R = Nd, Sm, Eu, Gd, Dy and Ho)

机译：R2WO6的磁性（其中R = Nd，Sm，Eu，Gd，Dy和Ho）

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摘要

The magnetic and electrical measurements carried out on the R2WO6 tungstates showed a paramagnetic behaviour for samples with R = Nd, Gd, Dy and Ho and more complex one for samples with R = Sm and Eu in the temperature range 4.2-280 K and an insulating state at room temperature. With increasing atomic number of the R element the Curie-Weiss temperature increases from -43.5 K for Nd2WO6 to -2.7 K for Ho2WO6, excluding Sm2WO6 and Eu2WO6 compounds for that the Curie-Weiss region is not observed and the imaginary part of susceptibility is close to zero. The effective magnetic moment is close to the theoretical one for the free R ion and the magnetic moment measured in magnetic field of 14 T and at temperature of 4.2 K, generally, does not reach the saturation state. The temperature independent residual susceptibility is negative for Nd2WO6 and positive for the remaining compounds suggesting different proportions of the Landau, Pauli and van Vleck contributions to the total susceptibility. An increase of the orbital magnetic contribution to the total magnetic moment is suggested from the fitting of the Lande factor in the compounds under study.
机译：在R2WO6钨酸盐上进行的磁和电测量表明，在4.2-280 K的温度范围内，R = Nd，Gd，Dy和Ho的样品具有顺磁性能，而R = Sm和Eu的样品具有更复杂的磁性能。室温下状态。随着R元素原子序数的增加，居里-魏斯温度从Nd2WO6的-43.5 K升高到Ho2WO6的-2.7 K，不包括Sm2WO6和Eu2WO6化合物，因为未观察到居里-魏斯区，并且磁化率的虚部接近归零。对于自由R离子，有效磁矩接近于理论磁矩，并且在14 T磁场和4.2 K温度下测得的磁矩通常不会达到饱和状态。与温度无关的残留磁化率对Nd2WO6为负，而对其余化合物为正，表明Landau，Pauli和van Vleck对总磁化率的贡献比例不同。兰德因子在研究化合物中的拟合表明轨道磁对总磁矩的贡献增加。

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