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A kind of magneto-optic crystal material and preparation method thereof

A technology of magneto-optical crystal and single crystal, applied in the field of Sm1-xRxFeO3 magneto-optical single crystal material, can solve problems such as hindering the application of materials

Active Publication Date: 2018-10-30
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the general rare earth ferrite RFeO 3 The spin reorientation temperatures are all at 10 1 K level, such as TmFeO 3 and HoFeO 3 The spin reorientation temperatures are 80K and 38-52K respectively (see Nature.2004, 429: 6994; Nature Physics 2009, 5: 10), so the current research results based on rare earth ferrite single crystal materials are obtained at low temperatures , thus hindering the application research of this series of materials

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  • A kind of magneto-optic crystal material and preparation method thereof
  • A kind of magneto-optic crystal material and preparation method thereof

Examples

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Embodiment 1

[0038] Example 1: Growing Sm 0.7 Tb 0.3 FeO 3 single crystal

[0039] Will Sm 2 o 3 and, Tb 2 o 3 and Fe 2 o 3 , the three raw materials are mixed according to the molar ratio of 0.7:0.3:1. After mechanical mixing, they are pre-fired at 1100°C for 10h, pressed into rods under 60MP isostatic pressure, and sintered in a muffle furnace at 1500°C for 20h. In the optical floating zone growth furnace, the process parameters of the optical floating zone method: the power of the filament is 67.5%, the rotation speed of the upper and lower rods is 15 revolutions per minute, and the growth rate is 1.0-2.0mm / h. Heating with laser focus, growing crystals in an air atmosphere ( Such as figure 1 shown). Sm that will grow 0.7 Tb 0.3 FeO 3 The single crystal Laue was oriented and cut into wafers. After polishing, the spin reorientation temperature of the crystal was obtained by testing the relationship between the magnetization of different crystal orientations and the temperatur...

Embodiment 2

[0040] Example 2: Growing Sm 0.6 Gd 0.4 FeO 3 single crystal

[0041] Will Sm 2 o 3 and, Gd 2 o 3 and Fe 2 o 3 , the three raw materials are mixed according to the molar ratio of 0.6:0.4:1. After mechanical mixing, they are pre-fired at 1000°C for 10 hours, pressed into rods under 80MP isostatic pressure, and sintered in a muffle furnace at 1400°C for 20 hours. In the optical floating zone growth furnace, the process parameters of the optical floating zone method: the power of the filament is 65.7%, the rotation speed of the upper and lower rods is 20 revolutions per minute, the growth rate is 2.0-3.0mm / h, and the crystal is grown in an air atmosphere by laser focusing and heating . Sm that will grow 0.6 Gd 0.4 FeO 3 The single crystal Laue was oriented and cut into wafers. After polishing, the spin reorientation temperature of the crystal was obtained by testing the relationship between the magnetization of different crystal orientations and the temperature with a...

Embodiment 3

[0042] Example 3: Growing Sm 0.8 Er 0.2 FeO 3 single crystal

[0043] Will Sm 2 o 3 and, Er 2 o 3 and Fe 2 o 3 , the three raw materials are mixed according to the molar ratio of 0.8:0.2:1. After mechanical mixing, they are pre-fired at 1000°C for 10 hours, pressed into rods under 100MP isostatic pressure, and sintered in a muffle furnace at 1400°C for 15 hours. In the optical floating zone growth furnace, the process parameters of the optical floating zone method: the power of the filament is 66%, the rotation speed of the upper and lower rods is 15 revolutions per minute, the growth rate is 1.0-2.0mm / h, and the crystal is grown in an air atmosphere by laser focusing and heating . The Sm that will grow 0.8 Er 0.2 FeO 3 The single crystal Laue was oriented and cut into wafers. After polishing, the spin reorientation temperature of the crystal was obtained by testing the relationship between the magnetization of different crystal orientations and the temperature wit...

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Abstract

The invention relates to a magnetic-optical crystal material and a preparation method thereof. The composition chemical formula of the magnetic-optical crystal material is Sm1-xRxFeO3, wherein R includes at least one of Gd, Tb, Yb and Er, and x is in range of 0.2-0.8.

Description

technical field [0001] The present invention relates to RFeO 3 (R is a rare earth element) doping Sm to obtain Sm with room temperature spin reorientation transition temperature 1-x R x FeO 3 The invention relates to a magneto-optical single crystal material, which belongs to the field of material design. Background technique [0002] RFeO 3 Orthoferrite (R is a rare earth element) is a magneto-optical crystal material with unique magnetic properties. Magneto-optical crystals are mainly used in the production of optical isolators, magneto-optical memories and modulators, optical fiber communications and integrated optical devices, computer storage, logic operations and transmission functions, magneto-optical displays, magneto-optical recordings, etc. RFeO 3 Orthoferrite, a series of materials, has shown great application potential in the development of fast magneto-optical switches, magneto-optical sensors, magnetic storage and other devices, and has attracted extensiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/24C30B13/00
Inventor 赵向阳王博武安华徐军
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI