RT Journal Article
T1 Structural, magnetic and dielectric properties of the novel magnetic spinel compounds ZnCoSnO₄ and ZnCoTiO₄
A1 Ruiz León, Domingo
A1 Mompean, Federico
A1 Prado Gonja, Jesús
A1 Marco, José F.
A1 García Hernandez, Mar
A1 Schmid, Rainer
AB The transparent semiconductor Zn₂SnO₄ with cubic spinel structure and the isostructural Zn₂Ti₄O have been magnetically doped with Co^(2++) ZnCoSnO₄ and ZnCoTiO₄ exhibit ferrimagnetism below TN ≈ 13 K and TN ≈ 17 K. Ferrimagnetic moments are evident in M vs H curves below TN by  small hysteresis. Fits to strictly linear Curie-Weiss plots above TN give  µ_(eff) ≈ to 4.86 µ(B) and a ≈  to 4.91 µB for ZnCoSnO₄ and ZnCoTiO₄, above theoretical predictions. Impedance spectroscopy data from sintered ceramic can be fitted with a standard equivalent circuit model based on two RC elements for bulk and GB areas. The relative dielectric permittivity of the bulk is ≈ 20 and ≈  to 30 for Zn₂SnO₄ and Zn₂TiO₄. The semiconducting ZnCoSn SnO₄ and ZnCoTiO₄ceramics exhibit bulk resistivity of ≈ to 1 10⁶Ω cm and ≈ to 1 10⁵ Ωcm at 560 K (287°C), and bulk activation energies of EA ≈ to 1.2 eV and 1.1 eV.
PB Elsevier Science BV
SN 0955-2219
YR 2018
FD 2018-12
LK https://hdl.handle.net/20.500.14352/12282
UL https://hdl.handle.net/20.500.14352/12282
LA eng
NO ©Elsevier Science BV.R.S. acknowledges a travel grant (Convenio Internacional) from the Universidad Complutense de Madrid to visit the USACH in Chile. JPG thanks the Spanish MINECO for granting a Juan de la Cierva fellowship. Spanish MINECO grant MAT2014-52405-C2-2- R is also acknowledged.
NO Ministerio de Economía y Competitividad (MINECO)
NO Universidad Complutense de Madrid
DS Docta Complutense
RD 8 may 2024