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Materials 2018, 11(9), 1652;

Enhancement in Curie Temperature of Yttrium Iron Garnet by Doping with Neodymium

Área Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo 42184, Mexico
Centro de Investigación e Innovación Tecnológica, Instituto Politécnico Nacional, Azcapotzalco, Ciudad de México 02250, Mexico
Centro de Ingeniería de Superficies y Acabados (CENISA), Facultad de Ingeniería, UNAM, Circuito Exterior, Ciudad Universitaria, Ciudad de México 04510, Mexico
Author to whom correspondence should be addressed.
Received: 15 June 2018 / Revised: 5 September 2018 / Accepted: 5 September 2018 / Published: 7 September 2018
(This article belongs to the Section Structure Analysis and Characterization)
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The effect of the substitution of Y3+ by Nd3+ on the structural and magnetic properties of neodymium-doped yttrium iron garnet, NdxY3−xFe5O12 with x in the range of 0–2.5, is presented. Oxide powders of Fe2O3, Nd2O3, and Y2O3 were mixed in a stoichiometric ratio and milled for 5 h using high-energy ball milling, before being uniaxially pressed at 900 MPa and annealed at 1373 K for 2 h to obtain NdxY3−xFe5O12 (0 ≤ x ≤ 2.5). It was found that the mechanical milling of oxides followed by annealing promotes the complete structural formation of the garnet structure. Additionally, the X-ray diffraction patterns confirm the complete introduction of Nd3+ into the garnet structure with a neodymium doping concentration (x) of 0–2.0, which causes a consistent increment in the lattice parameters with the Nd3+ content. When x is higher than 2.0, the yttrium orthoferrite is the predominant phase. Besides, the magnetic results reveal an increase in the Curie temperature (583 K) as the amount of Nd3+ increases, while there was enhanced saturation magnetization as well as modified remanence and coercivity with respect to non-doped YIG. View Full-Text
Keywords: NdxY3−xFe5O12; rare earth doped YIG; yttrium iron garnet; Y3Fe5O12; Curie temperature NdxY3−xFe5O12; rare earth doped YIG; yttrium iron garnet; Y3Fe5O12; Curie temperature

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Baños-López, E.; Sánchez-De Jesús, F.; Cortés-Escobedo, C.A.; Barba-Pingarrón, A.; Bolarín-Miró, A.M. Enhancement in Curie Temperature of Yttrium Iron Garnet by Doping with Neodymium. Materials 2018, 11, 1652.

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