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R-M interactions in R2BaMO5 (R=Y or Gd and M=Cu or Zn)

Autor: Goya, G. F., Mercader, R. C., Steren, L. B., Sánchez, R. D., Causa, M. T., Tovar, M.

Publikováno v: J. Phys. Condens. Matter 8 (1996) 4529,4537

R2BaMO5 (R = Gd, Y and M = Cu, Zn) oxides have been studied by specific heat, dc magnetic susceptibility, and electron paramagnetic resonance (EPR). For one member of the series without magnetic moment at M, namely Gd2BaZnO5, measurements reveal long

Externí odkaz: http://arxiv.org/abs/1302.6327

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Charge disproportionation in YNiO$_{3}$ : ESR and susceptibility study

Autor: Causa, M. T., Sánchez, R. D., Tovar, M., Alonso, J. A., Martínez-Lope, M. J.

We present a study of the magnetic properties of YNiO$_{3}$ in the paramagnetic range, above and below the metal-insulator (MI) transition. The dc susceptibility, $\chi_{dc}$ (measured up to 1000 K) is a decreasing function of T for $T >$150 K (the N

Externí odkaz: http://arxiv.org/abs/cond-mat/0211662

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High temperature susceptibility in electron doped Ca1-xYxMnO3: Double Exchange vs Superexchange

Autor: Aliaga, H., Causa, M. T., Tovar, M., Butera, A., Alascio, B., Vega, D., Leyva, G., Polla, G., Konig, P.

We present a study of the magnetic properties of the electron doped manganites Ca1-xYxMnO3 (for 0<=x<=0.25) in the paramagnetic regime. For the less doped samples (x<=0.1) the magnetic susceptibility, c(T), follows a Curie-Weiss (CW) law only for T >

Externí odkaz: http://arxiv.org/abs/cond-mat/0211242

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Evidence of strong antiferromagnetic coupling between localized and itinerant electrons in ferromagnetic Sr2FeMoO6

Autor: Tovar, M., Causa, M. T., Butera, A., Navarro, J., Martinez, B., Fontcuberta, J., Passeggi, M. C. G.

Magnetic dc susceptibility ($\chi$) and electron spin resonance (ESR) measurements in the paramagnetic regime, are presented. We found a Curie-Weiss (CW) behavior for $\chi$(T) with a ferromagnetic $\Theta = 446(5)$ K and $\mu_{eff} = 4.72(9) \mu_{B}

Externí odkaz: http://arxiv.org/abs/cond-mat/0205187

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Magnetic polarons in Ca_(1-x)Y_xMnO_3

Autor: Aliaga, H., Causa, M. T., Tovar, M., Alascio, B.

Publikováno v: Physica B 320, 75 (2002).

Experimental evidence show that in the magnetoresistive manganite Ca_(1-x) Y_xMnO_3, ferromagnetic (FM) polarons arises in an antiferromagnetic (AF) background, as a result of the doping with Yttrium. This hypothesis is supported in this work by clas

Externí odkaz: http://arxiv.org/abs/cond-mat/0108284

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Double Exchange in Electron Doped Ca1-xYxMnO3 Manganites

Autor: Aliaga, H., Causa, M. T., Butera, A., Alascio, B., Salva, H., Vega, M. Tovar D., Polla, G., Leyva, G., Konig, P.

We have studied structural, magnetic and transport properties as a function of temperature and magnetic field in the electron doped manganite YxCa1-xMnO3, for 0

Externí odkaz: http://arxiv.org/abs/cond-mat/0010295

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Delocalized and localized states of eg electrons in half-doped manganites

Autor: Winkler, Elin Lilian, Tovar, Manuel, Causa, M. T.

We have studied the magnetic behaviour of half-doped manganite Y0.5Ca0.5MnO3 in an extended range of temperatures by means of magnetic susceptibility and electron spin resonance (ESR) experiments. At high temperature the system crystallizes in an ort

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3498::be495be8c8a3123b01a25effbbb200e8
http://iopscience.iop.org/article/10.1088/0953-8984/25/29/296003/meta

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