Magnetization Dynamics Behavior in Y 3 Fe 5 O 12 Particles
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ORIGINAL PAPER
Magnetization Dynamics Behavior in Y3Fe5O12 Particles J. F. Barrón-López 1 & A. Bolarín-Miró 1 & F. Sánchez De-Jesús 1 & G. Alvarez 2 & V. Gómez-Vidal 3 & H. Montiel 4 Received: 28 July 2020 / Accepted: 29 September 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract YIG particles were obtained by Pechini method with a thermal annealing between 800 and 1200 °C. The formation of the cubic YIG phase was corroborated by means of X-ray diffraction (XRD), where YIG particles have crystallite size range between 107 and 303 nm. Magnetization dynamics were studied by means of magnetization hysteresis cycles, ferromagnetic resonance, and micromagnetic simulations. Different magnetic processes were determined as particle size function, and the magnetization dynamics can be explained by different contributions, such as single domain state, magnetic vortex state, and superparamagnetic behavior, besides considering their interactions. Keywords Yttrium iron garnet (YIG) particles . Single domains . Superparamagnetic particles . Ferromagnetic resonance
1 Introduction The yttrium iron oxide Y3Fe5O12 (YIG) has a garnet-type crystalline structure, with saturation magnetization of Ms = 26 emu/ g, with an exchange constant of A = 3.7 × 10−12 J/m, Curie temperature TC = 560 K [1–5], and cubic magnetocrystalline anisotropy constant (K 1 = − 610 J/m 3 ). YIG is a notcompensated antiferromagnetic, therefore, and it has a notcompensated coupling between spins from ferric ions allocated Highlights • Y3Fe5O12 (YIG) particles were obtained by the Pechini/ polymeric precursor method. • Saturation magnetization (Ms) and coercive field (Hc) have a strong dependence with crystallite size. • Micromagnetic simulations showed the existence of single domain and vortex states in YIG particles. * H. Montiel [email protected] 1
Area Académica de Ciencias de la Tierra y Materiales, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo km 4.5, 42184 Pachuca de Soto, Hidalgo, Mexico
2
Universidad Autónoma de la Ciudad de México, Campus Cuautepec, Av. de la Corona 320, Loma de la Palma, 07160 Mexico City, Mexico
3
Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Coyoacán, 04510 Mexico City, Mexico
4
Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Coyoacan, 04510 Mexico City, Mexico
at the tetrahedral (24d) and octahedral (16a) sites. In consequence, the magnetic moment is aligned parallel to one of the cube body diagonals (< 111 > directions) in the bcc lattice of the garnet structure (see Fig. 1), where Y3+ ions of dodecahedral (24c) sites not contributed to magnetic moment [6]. YIG is used in microwave frequencies’ applications, due to their low losses, where the single crystals have ferromagnetic resonance with smaller linewidth, ΔH ~ 0.05 mT at 9 GHz [3, 8]. Magnetic behavior of YIG depends strongly on the microstructural features of ea
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