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Magnetic properties of Yb2Mo2O7 and Gd2Mo2O7 from rare earth Mossbauer measurements

Autor: Hodges, J. A., Bonville, P., Forget, A., Sanchez, J. P., Vulliet, P., Rams, M., Krolas, K.

Publikováno v: Eur. Phys. J B 33 (2003) 173-181

Using 170-Yb and 155-Gd Mossbauer measurements down to 0.03K, we have examined the semiconducting pyrochlore Yb2Mo2O7 where the Mo intra-sublattice interaction is anti-ferromagnetic and the metallic pyrochlore Gd2Mo2O7 where this interaction is ferro

Externí odkaz: http://arxiv.org/abs/cond-mat/0307677

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Low temperature spin fluctuations in geometrically frustrated Yb3Ga5O12

Autor: Hodges, J. A., Bonville, P., Rams, M., Krolas, K.

Publikováno v: J. Phys.: Condens. Matter 15 (2003) 4631-4639

In the garnet structure compound Yb3Ga5O12, the Yb3+ ions (ground state effective spin S' = 1/2) are situated on two interpenetrating corner sharing triangular sublattices such that frustrated magnetic interactions are possible. Previous specific hea

Externí odkaz: http://arxiv.org/abs/cond-mat/0307676

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Transition and spin dynamics at very low temperature in the pyrochlores Yb2Ti2O7 and Gd2Sn2O7

Autor: Bonville, P., Hodges, J. A., Bertin, E., Bouchaud, J. P., Ocio, M., de Reotier, P. Dalmas, Regnault, L. P., Ronnow, H. M., Sanchez, J. P., Sosin, S., Yaouanc, A., Rams, M., Krolas, K.

The very low temperature properties of two pyrochlore compounds, Yb2Ti2O7 and Gd2Sn2O7, were investigated using an ensemble of microscopic and bulk techniques. In both compounds, a first order transition is evidenced, as well as spin dynamics persist

Externí odkaz: http://arxiv.org/abs/cond-mat/0306470

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First Order Transition in the Spin Dynamics of Geometrically Frustrated Yb2Ti2O7

Autor: Hodges, J. A., Bonville, P., Forget, A., Yaouanc, A., de Reotier, P. Dalmas, Andre, G., Rams, M., Krolas, K., Ritter, C., Gubbens, P. C. M., Kaiser, C. T., King, P. J. C., Baines, C.

Publikováno v: Phys. Rev. Lett. 88 (2002) 077204

Using neutron diffraction, 170Yb Mossbauer and muSR spectroscopies, we have examined the pyrochlore Yb2Ti2O7 where the Yb3+ S'=1/2 ground state has planar anisotropy. Below ~0.24K, the temperature of the known specific heat lambda transition, there i

Externí odkaz: http://arxiv.org/abs/cond-mat/0201166

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