TY - JOUR
T1 - Structure and magnetic properties of GdxY1- xFeO3 obtained by mechanosynthesis
AU - Bolarín-Miró, A. M.
AU - Sánchez-De Jesús, F.
AU - Cortés-Escobedo, C. A.
AU - Valenzuela, R.
AU - Ammar, S.
N1 - Funding Information:
This project was financially assisted by the National Science and Technology Council of Mexico , CONACyT, under Grants Nos. 129910 , 130413 and ANR-CONACyT 139292 . Authors would like to acknowledge the technical contribution with the X-ray diffraction measurements from Adriana Tejeda-Cruz.
PY - 2014
Y1 - 2014
N2 - Solid solutions of yttrium-gadolinium orthoferrites GdxY 1-xFeO3 (0 ≤ x ≤ 1) were prepared by high-energy ball milling. The aim of this work was to study the influence of the synthesis parameters on the crystal structure and the magnetic behavior of these solid solutions. The precursors, Fe2O3, Y 2O3 and Gd2O3, mixed in a stoichiometric ratio to obtain these orthoferrites, were milled for different times (up to 5 h). X-ray diffraction and Rietveld refinement were used to elucidate the phase transformation as a function of the milling time. Results showed the complete formation of orthoferrite with an orthorhombic structure (S.G. Pbnm) without any annealing after 5 h of milling for all of the compositions. The effect of the synthesis process and the x value on the crystal structure and the magnetic properties were also studied. All of the synthesized powders demonstrated weak ferromagnetic behavior. In particular, an increase in the maximum magnetization for all the compositions was found, with a maximum that reached 7.7 emu/g for Gd0.75Y0.25FeO3. For Gd0.5Y0.5FeO3, the magnetization decreases down to 2.1 emu/g. A small contamination of metallic Fe was confirmed through electron spin resonance experiments.
AB - Solid solutions of yttrium-gadolinium orthoferrites GdxY 1-xFeO3 (0 ≤ x ≤ 1) were prepared by high-energy ball milling. The aim of this work was to study the influence of the synthesis parameters on the crystal structure and the magnetic behavior of these solid solutions. The precursors, Fe2O3, Y 2O3 and Gd2O3, mixed in a stoichiometric ratio to obtain these orthoferrites, were milled for different times (up to 5 h). X-ray diffraction and Rietveld refinement were used to elucidate the phase transformation as a function of the milling time. Results showed the complete formation of orthoferrite with an orthorhombic structure (S.G. Pbnm) without any annealing after 5 h of milling for all of the compositions. The effect of the synthesis process and the x value on the crystal structure and the magnetic properties were also studied. All of the synthesized powders demonstrated weak ferromagnetic behavior. In particular, an increase in the maximum magnetization for all the compositions was found, with a maximum that reached 7.7 emu/g for Gd0.75Y0.25FeO3. For Gd0.5Y0.5FeO3, the magnetization decreases down to 2.1 emu/g. A small contamination of metallic Fe was confirmed through electron spin resonance experiments.
KW - Doped GdFeO
KW - Doped YFeO
KW - Mechanochemical processing
KW - Mechanochemistry
KW - Orthoferrite
UR - http://www.scopus.com/inward/record.url?scp=84889101275&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2013.04.029
DO - 10.1016/j.jallcom.2013.04.029
M3 - Artículo
SN - 0925-8388
VL - 586
SP - S90-S94
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - SUPPL. 1
ER -