Microstructure and Properties of Bi-doped Yttrium Iron Garnet Magneto-optical Ceramics Prepared by Hot-pressing Sintering Process

AbstractBismuth-substituted yttrium iron garnet, BixY1−xFe5O12 thin films have been epitaxially grown on a Gd3Ga5O12 (111) substrate at 750°C under reduced pressure (6 Torr), with a deposition rate of 20∼50nm·min−1 by MOCVD. The maximum value of Faraday rotation was −7.5×104deg·cm−1at a Bi-content of 2.5 atoms per formula unit. The Figure of unit was 14.30 deg., which is significantly larger than that obtained by sputtering. On the other hand, cerium-substituted films could not be obtained even at elevated temperatures, 900°C.

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Open die hot pressing of yttrium iron garnet

Materials Research Bulletin ◽

10.1016/0025-5408(80)90148-8 ◽

1980 ◽

Vol 15 (5) ◽

pp. 665-670 ◽

Cited By ~ 4

Author(s):

Om Prakash ◽

C.M. Srivastava

Keyword(s):

Hot Pressing ◽

Yttrium Iron Garnet ◽

Yttrium Iron ◽

Iron Garnet

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Effect of Zr-Substitution on the Magnetic Property of a YIG Ferrite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.449-452.1077 ◽

2004 ◽

Vol 449-452 ◽

pp. 1077-1080 ◽

Cited By ~ 1

Author(s):

S.J. Yang ◽

S.D. Kim ◽

Ji Soon Kim

Keyword(s):

Magnetic Property ◽

Yttrium Iron Garnet ◽

Electromagnetic Properties ◽

Sintering Process ◽

Yttrium Iron ◽

Satellite Broadcasting ◽

Zr Addition ◽

Rf Communication ◽

Ceramic Sintering ◽

Iron Garnet

Yttrium Iron Garnet (YIG) has been used as an important material in the Circulator/Isolator which is used in RF communication system, mobile phone, and satellite broadcasting, etc. In this study, we investigated the variation of electromagnetic properties of YIG ferrites for Isolator/Circulator application with Zr addition. The YIG ferrites, Y2.1Ca0.9Fe4.4-xV0.5In0.05Al0.05ZrxO12 with x=0, 0.05, 0.1 and 0.2, were prepared by the conventional ceramic sintering process. The Zr-substituted YIG ferrite, Y2.1Ca0.9Fe4.4-xV0.5In0.05Al0.05ZrxO12, showed the highest saturation magnetization (1097 gauss) at x=0.1. Good microwave properties were shown as isolation of 18.60 dB and insertion loss of 0.45 dB at x=0.2. In addition, the ferromagnetic resonance (FMR) linewidth decreased as Zr content increased

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Analysis and lattice imaging of a transitional event on garnets

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100108490 ◽

1978 ◽

Vol 36 (1) ◽

pp. 270-271

Author(s):

J.Y. Laval

Keyword(s):

Yttrium Iron Garnet ◽

Reciprocal Lattice ◽

Transitional Zone ◽

Lattice Imaging ◽

Yttrium Iron ◽

X Ray ◽

Ionic Process ◽

The Matrix ◽

High Resolution Technique ◽

Iron Garnet

The exsolution of magnetite from a substituted Yttrium Iron Garnet, containing an iron excess may lead to a transitional event. This event is characterized hy the formation of a transitional zone at the center of which the magnetite nucleates (Fig.1). Since there is a contrast between the matrix and these zones and since selected area diffraction does not show any difference between those zones and the matrix in the reciprocal lattice, it is of interest to analyze the structure of the transitional zones.By using simultaneously different techniques in electron microscopy, (oscillating crystal method microdiffraction and X-ray microanalysis)one may resolve the ionic process corresponding to the transitional event and image this event subsequently by high resolution technique.

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