Magneto-Optical Investigation of Thin-Film Magnetic Structures

After the discovery of antiferromagnetic interaction [, giant magnetoresistance [ and oscillating magnetic interaction [, the exchange coupling between magnetic layers across the conductive nonmagnetic spacer layer in multilayer structures have been attracted much attention [4-.

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ChemInform Abstract: Layered Magnetic Structures: Interlayer Exchange Coupling and Giant magnetoresistance

ChemInform ◽

10.1002/chin.199532296 ◽

2010 ◽

Vol 26 (32) ◽

pp. no-no

Author(s):

A. FERT ◽

P. GRUENBERG ◽

A. BARTHELEMY ◽

F. PETROFF ◽

W. ZINN

Keyword(s):

Exchange Coupling ◽

Giant Magnetoresistance ◽

Interlayer Exchange Coupling ◽

Magnetic Structures ◽

Interlayer Exchange

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Control of the noncollinear interlayer exchange coupling

Science Advances ◽

10.1126/sciadv.abd8861 ◽

2020 ◽

Vol 6 (48) ◽

pp. eabd8861

Author(s):

Zachary R. Nunn ◽

Claas Abert ◽

Dieter Suess ◽

Erol Girt

Keyword(s):

Exchange Coupling ◽

Magnetic Moments ◽

Interlayer Exchange Coupling ◽

Magnetic Structures ◽

Spintronic Devices ◽

Spacer Layer ◽

Ferromagnetic Layers ◽

Almost All ◽

Interlayer Exchange ◽

Coupling Angle

Interlayer exchange coupling in transition metal multilayers has been intensively studied for more than three decades and is incorporated into almost all spintronic devices. With the current spacer layers, only collinear magnetic alignment can be reliably achieved; however, controlling the coupling angle has the potential to markedly expand the use of interlayer exchange coupling. Here, we show that the coupling angle between the magnetic moments of two ferromagnetic layers can be precisely controlled by inserting a specially designed magnetic metallic spacer layer between them. The coupling angle is controlled solely by the composition of the spacer layer. Moreover, the biquadratic coupling strength, responsible for noncollinear alignment, is larger than that of current materials. These properties allow for the fabrication and study of not yet realized magnetic structures that have the potential to improve existing spintronic devices.

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Layered magnetic structures: interlayer exchange coupling and giant magnetoresistance

Journal of Magnetism and Magnetic Materials ◽

10.1016/0304-8853(94)00880-9 ◽

1995 ◽

Vol 140-144 ◽

pp. 1-8 ◽

Cited By ~ 131

Author(s):

A. Fert ◽

P. Grünberg ◽

A. Barthélémy ◽

F. Petroff ◽

W. Zinn

Keyword(s):

Exchange Coupling ◽

Giant Magnetoresistance ◽

Interlayer Exchange Coupling ◽

Magnetic Structures ◽

Interlayer Exchange

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Theory of Oscillatory Exchange Between Magnetic Layers Through a Nonmagnetic Transition–Metal Spacer

MRS Proceedings ◽

10.1557/proc-231-179 ◽

1991 ◽

Vol 231 ◽

Author(s):

J. Mathon

Keyword(s):

Transition Metal ◽

General Theory ◽

Fermi Surface ◽

Temperature Dependence ◽

Exchange Coupling ◽

Asymptotic Decay ◽

Close Analogy ◽

Magnetic Layers ◽

Spacer Layer

AbstractA general theory of oscillations in the exchange coupling between two transition metal ferromagnets separated by a nonmagnetic transition metal spacer is developed. A close analogy between oscillations in the exchange coupling and de Haas-van Alphen oscillations is established and exploited to show that the period, asymptotic decay, and temperature dependence of the oscillations are determined by properties of the d band Fermi surface in the spacer layer. The theory accounts qualitatively and even semiquantitatively for all the salient experimental features of the oscillations in the exchange coupling observed recently in Co/Ru, Co/Cr, and Fe/Cr superlattices.

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First-principle calculations of the exchange interaction characteristics for multilayer magnetic structures

EPJ Web of Conferences ◽

10.1051/epjconf/201818503007 ◽

2018 ◽

Vol 185 ◽

pp. 03007 ◽

Cited By ~ 1

Author(s):

Marina Mamonova ◽

Vladimir Prudnikov

Keyword(s):

Exchange Interaction ◽

Giant Magnetoresistance ◽

Multilayer Structures ◽

Hard Disks ◽

Magnetic Multilayer ◽

Generalized Gradient ◽

Magnetic Structures ◽

Spintronic Devices ◽

Ferromagnetic Layers ◽

Projector Augmented Wave

Magnetic multilayer structures which consist of the ferromagnetic layers separated by nonmagnetic layers with giant magnetoresistance (GMR) are widely used as spintronic devices and read heads of hard disks. In this work magnetic and exchange interaction characteristics of Co/Cu/Co, Ni/Cu/Ni and Fe/Cr/Fe multilayer structures are studied by using VASP software package within the Projector Augmented Wave (PAW) method with generalized-gradient approximation (GGA PBE).The finite temperature magnetism of these structures was studied by Monte-Carlo simulations with the use of the exchange interaction parameters obtained from the ab initio results.

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