A New Method of Intergrain Exchange Interaction Energy Determination in Nanostructured Alloys with Spontaneous Spin-Reorientation Transition

Aleksey Sergeevich Volegov; Anton S. Bolyachkin; Nikolay Vladimirovich Kudrevatykh

doi:10.4028/www.scientific.net/SSP.233-234.615

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HomeSolid State PhenomenaSolid State Phenomena Vols. 233-234A New Method of Intergrain Exchange Interaction...

A New Method of Intergrain Exchange Interaction Energy Determination in Nanostructured Alloys with Spontaneous Spin-Reorientation Transition

Abstract:

A new method of intergrain exchange interaction energy determination in nanostructured magnetically hard alloys with spontaneous spin-reorientation transition has been developed and verified. It is based on the knowing of the material magnetic anisotropy constants values at its “easy cone” state and the external negative magnetic field strength H, which reversibly “tears” the exchange coupling between nanograins. It should be more than exchange field and smaller than coercivity value. Using this method the exchange interaction energy parameter for MQP-B+ alloy was estimated. Its value is in agreement with estimated one by FMR technique for film system Fe-Nd₂Fe₁₄B and close to that obtained from the remanent magnetization temperature dependences measurements in negative magnetic fields.

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Periodical:

Solid State Phenomena (Volumes 233-234)

Pages:

615-618

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.233-234.615

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Online since:

July 2015

Authors:

Aleksey Sergeevich Volegov, Anton S. Bolyachkin, Nikolay Vladimirovich Kudrevatykh*

Keywords:

Exchange Interaction, Exchange Interaction Constant, Nanocomposite, Spin-Reorientation Transition

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