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Semimetal magnetic material with high spinning polarizability

A technology of metal magnetism and polarizability, applied in the direction of magnetic materials, magnetic objects, material selection, etc., can solve problems such as insufficiency

Inactive Publication Date: 2006-03-22
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it should be noted that it is necessary but not sufficient to use this integer spin magnetic moment as a semimetal criterion.

Method used

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  • Semimetal magnetic material with high spinning polarizability
  • Semimetal magnetic material with high spinning polarizability
  • Semimetal magnetic material with high spinning polarizability

Examples

Experimental program
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Effect test

Embodiment 1

[0014] According to the chemical formula Mn 2 CoAl weighs Mn, Co and Al, then mixes them and uses the conventional arc melting method for repeated melting to make the sample uniform. The preparation conditions are: vacuumize to 1×10 -1 -1×10 -6 Argon is filled after Pa, and arc melting is carried out under the protection of positive pressure of 0.01 to 1MPa or flowing argon.

[0015] The chemical formula of the material is Mn 2 Magnetic alloy of CoAl; the calculated spin polarizability is 100%, which is a typical semi-metallic material. The shape of the calculated energy density curve is shown in figure 1 . The spin polarizability and saturation magnetization were measured, and the obtained values ​​are shown in Table 1.

Embodiment 2

[0017] According to the chemical formula Mn 2 CoGa weighs Mn, Co and Ga, and the preparation process is the same as in Example 1.

[0018] The chemical formula of the material is Mn 2 CoGa magnetic alloy; the calculated spin polarizability is 100%, which is a typical semi-metallic material. The shape of the calculated energy density curve is shown in figure 1 . The spin polarizability and saturation magnetization were measured, and the obtained values ​​are shown in Table 1.

Embodiment 3

[0020] According to the chemical formula Mn 2 CoSi weighs Mn, Co and Si, and the preparation process is the same as in Example 1.

[0021] The chemical formula of the material is Mn 2 A magnetic alloy of CoSi; the calculated spin polarizability is 100%, which is a typical semi-metallic material. The shape of the calculated energy density curve is shown in figure 2 . The spin polarizability and saturation magnetization were measured, and the obtained values ​​are shown in Table 1.

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Abstract

This invention relates to a metallic magnetic material with high spin polarizability having the following formula: Mnx CoyNzMw, among which, N is the element of III-V group, such as one or many of Al, Ga, In, Si, Ge, Sn and Sb, M is the transition group element: V, Cr Fe and Ni, x is less than or equal to 2.2 but greater or equal to 1.8, y is less than or equal to 1.2 but greater or equal to o, z is less than or equal to 1.2 but greater than o, w is less than or equal to 0.99 but greater or equal to o and x +y+z+w=4. The maximum spin polarizability in the material is 100%, which is a typical semi-metal magnetic material and the minimum is 80%.

Description

technical field [0001] The present invention generally relates to high spin polarizability materials, in particular to semi-metallic magnetic materials with spin polarizability close to 100%. Background technique [0002] Electrons are the unified carrier of charge and spin. During the conduction process, electrons with spin properties can exhibit unique physical effects when the material scale is equivalent to the physical characteristic length, such as giant magnetoresistance (GMR), tunneling Magnetoresistance, supermagnetoresistance effect and spin transfer, etc. In the past 100 years, microelectronics, based on the basic principle of electric field controlling the transport process of electron charges, has completely changed people's daily life. So, can we control another property of electrons, spin, to How about manipulating its transport behavior to create a new information age? Many scientific research achievements and industrial application facts in the field of sp...

Claims

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Application Information

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IPC IPC(8): H01F1/047H01L43/10
Inventor 刘国栋代学芳柳祝红朱志永陈京兰吴光恒
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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