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Measurement method for included angle between non-collinear anti-ferromagnetic coupling atom magnetic moments in rare earth (RE)-transition metal (TM) alloy

A transition metal, antiferromagnetic coupling technology, applied in the field of material physics, can solve the problem of no non-collinear magnetic moment angle measurement, no definite evidence to prove antiferromagnetic coupling, collinearity, etc.

Active Publication Date: 2019-11-05
CHINA THREE GORGES UNIV
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Problems solved by technology

However, subsequent related studies, such as neutron diffraction, Mössbauer spectroscopy, EXAFS, etc., have no definite evidence to prove that the antiferromagnetic coupling is collinear, and there is no report on the measurement of the angle between non-collinear magnetic moments

Method used

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  • Measurement method for included angle between non-collinear anti-ferromagnetic coupling atom magnetic moments in rare earth (RE)-transition metal (TM) alloy
  • Measurement method for included angle between non-collinear anti-ferromagnetic coupling atom magnetic moments in rare earth (RE)-transition metal (TM) alloy
  • Measurement method for included angle between non-collinear anti-ferromagnetic coupling atom magnetic moments in rare earth (RE)-transition metal (TM) alloy

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Embodiment Construction

[0031] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0032] Such as Figures 1 to 3 As shown, a pinned spin valve consisting of a double-layer RE-TM magnetic layer was fabricated on a thermally oxidized silicon substrate. Preparation of the spin valve: A thermally oxidized silicon substrate with a length of 10 mm, a width of 10 mm, and a thickness of 0.5 mm was ultrasonically cleaned with acetone, then ultrasonically cleaned with deionized water, and finally ultrasonically cleaned with absolute ethanol.

[0033] The cleaned substrate is blown dry with high-purity nitrogen, and the substrate is placed in the coating chamber of the magnetron sputtering coating equipment, and the coating chamber is pumped to 1×10 -5 Pascal's vacuum. Then fill the coating chamber with working gas to 0.3 Pascal argon, deposit a 10-nanometer thick IrMn film on the substrate by DC magnetron sputtering, add a bias voltage of 200 volts, an...

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Abstract

Provided is a measurement method for an included angle between non-collinear anti-ferromagnetic coupling atom magnetic moments in RE-TM alloy. A magnetoresistive angle resolution spectrum of a spinning valve composed of two RE-TM magnetic layers is measured to determine the included angle between the RE-TM non-collinear anti-ferromagnetic coupling atom magnetic moments; and a spinning valve composed of two RE-TM magnetic layers and an intermediate non-magnetic metal spacing layer issubjected to magnetoresistive angle resolution spectrum measurement. The angel resolution spectrum of the magnetic resistance of the pinning type spinning valve composed of the double RE-TM magnetic layers is measured to determine the included angle between the non-collinear anti-ferromagnetic coupling atom magnetic moments in the RE-TM alloy.

Description

technical field [0001] The invention belongs to the field of material physics, and in particular relates to a method for measuring the angle-resolved spectrum of spin valve magnetoresistance to determine the included angle between non-collinear antiferromagnetic coupling atomic magnetic moments of a rare earth-transition metal alloy (RE-TM). . Background technique [0002] Rare earth-transition metal (RE-TM) antiferromagnets are magnetic alloys formed of rare earth elements and transition group elements, where RE=Tb, Gd, Ho, etc., TM=Co, Fe, Ni, etc. Its magnetic structure is an antiferromagnetic coupling between RE atoms and TM atoms, but its magnetic order is usually not a simple ferrimagnet or antiferromagnet, but a non-collinear ferrimagnet or antiferromagnet. Moment and TM atomic magnetic moment exhibit antiferromagnetic coupling, and it is very easy to distribute on the conical surface with a certain angle α (0<α<90) with the TM atomic magnetic moment. Its magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04G01N27/72G01R33/12
CPCG01N27/041G01N27/72G01R33/1253
Inventor 易立志潘礼庆杨栋超肖强许云丽刘敏黄秀峰朴红光
Owner CHINA THREE GORGES UNIV
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