Magnetic properties and L1 phase formation of FePt films prepared by high current-density ion-beam irradiation and rapid thermal annealing methods

Yokota, Takeshi; Xu, Ying; Gao, Lan; Zhang, R.; Nicholl, L.; Lü, Yuan; Skomski, Ralph; Sellmyer, David J.; Liou, Sy‐Hwang; Lai, Chih‐Huang; Yang, Cheng‐Han; Huang, Sheng-Huang

doi:10.1063/1.1853018

Cited by 12 publications

(2 citation statements)

References 24 publications

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“…Recently, Ito and Kusunoki [109] discussed the ordering mechanism in FePt thin films by RTP. Yokota et al [110] also investigated the difference in magnetic textures and properties of FePt films prepared by RTP and high current-density ion-beam irradiation. It was reported that RTP induced (001) texture and strong magnetic perpendicular anisotropy while the latter produced samples with more isotropic behaviour due to a (111) texture.…”

Section: Magnetic Recording Mediamentioning

confidence: 99%

Rapid thermal processing of magnetic materials

Jin¹,

Liu²

2006

J. Phys. D: Appl. Phys.

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The rapid thermal processing (RTP) technique features dynamic control of temperature, which permits high heating and cooling rates that cannot be reached with conventional furnace treatments. In recent years, RTP has been increasingly applied to the processing of magnetic materials. The controllable heating profiles provide an approach for the deliberate construction of materials structure via expediting phase transitions and tailoring materials morphology. In this review, the history, principles and facilities of several types of RTP techniques are introduced, including laser and electron beam heating, lamp heating, Joule heating and pulse thermal processing techniques. RTP of various advanced magnetic materials are reviewed, including soft magnetic materials, spintronic materials, magnetic recording materials and nanocomposite hard magnetic materials. Advantages of RTP are highlighted and compared with conventional thermal treatments.

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Section: Magnetic Recording Mediamentioning

confidence: 99%

Rapid thermal processing of magnetic materials

Jin¹,

Liu²

2006

J. Phys. D: Appl. Phys.

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“…Moreover, structural and magnetic properties of L1 0 ordered FePt sensitively depend on the relative concentration of Fe and Pt, approaches of synthesis, post-deposition treatments, film structure in an as-deposited state, etc [6][7][8][9][10][11]. Therefore, wide research interest is directed at the optimization of structural and magnetic properties of FePt by synthesizing FePt films in diverse structures via various synthesis routes [12][13][14]. Some of the key factors that influence the disorder-order transformation kinetics in FePt films are as follows: Recent experimental findings demonstrated that the addition of Cu causes lattice distortion favoring the L1 0 transformation and (001) texturing in the films [15,16].…”

Section: Introductionmentioning

confidence: 99%

Atomic level mechanism of disorder-order transformation kinetics at nanoscale in FePt based systems

Kumar,

Tiwari,

Gupta

et al. 2024

Phys. Scr.

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L10 ordered FePt is one of the most promising materials for spintronic and recording media applications. In the present work, the mechanism of L10 phase transformation in FePt based films with varying initial structures is examined at the nanoscale to understand the ordering process using synchrotron based GIXRD, MOKE, VSM, and techniques with sub nanometer depth selectivity like XRR and SIMS. Precisely controlled compositions of the films are deposited using magnetron sputtering. Rapid thermal annealing is used for post-deposition processing. It is evaluated experimentally that for a shorter annealing time of 70 s at 400oC, besides volume diffusion, short circuit diffusion paths along the intercrystallite region owing to the presence of nanostructured grains play a dominant role in alloying behavior. A study of the L10 ordering process reveals the crucial role of film structure in controlling the transformation kinetics, texturing of nanograins, and magnetic coercivity. Diffusion studies disclose that type B diffusion kinetics is activated for the annealing time during which L10 transformation occurs in the films.

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Magnetization states and magnetization processes in nanostructures: From a single layer to multilayers

Maziewski

Faßbender

Kisielewski

et al. 2014

Physica Status Solidi (a)

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The results of combined (experimental, analytical, and micromagnetic simulations) studies on the evolution of magnetization states and processes in ultrathin films and multilayered systems are presented. We show ways to manipulate magnetization distributions in ultrathin magnetic single or multilayers by tuning: the thickness of the magnetic layer, the thickness of either the non‐magnetic cap or spacer layer, the magnetic anisotropy, and the geometrical constrictions of the system. In ultrathin magnetic films, both the magnetization distribution and the critical thickness of the magnetization reorientation phase transition (RPT) between perpendicular and in‐plane states can be also controlled by post‐growth treatments, e.g., by either ion or light irradiation. By changing the geometrical parameters of the nanostructure, as well as by an applied external magnetic field, one can tune magnetic domain sizes in a giant range (of a few orders of magnitude) and induce the RPT. Transitions between two‐ and three‐dimensional magnetization distributions are discussed.

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Magnetic properties and L1 phase formation of FePt films prepared by high current-density ion-beam irradiation and rapid thermal annealing methods

Cited by 12 publications

References 24 publications

Rapid thermal processing of magnetic materials

Rapid thermal processing of magnetic materials

Atomic level mechanism of disorder-order transformation kinetics at nanoscale in FePt based systems

Magnetization states and magnetization processes in nanostructures: From a single layer to multilayers

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