Magnetic properties of bilayers with a mixed-spin interface

Wiatrowski, G.; Warda, K.; Wojtczak, L.; Baldomir, D.; Pereiro, Manuel; Arias, J.E.

doi:10.1016/s0039-6028(02)01302-x

Cited by 5 publications

(9 citation statements)

References 19 publications

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“…The summations run over all pairs of nearest neighbour sites while each of them is labelled with the number of plane (n) and in-plane vector (j), respectively. The method considered is based on Callen equations extended to take into account the stochastic spin-mixed magnetic structure introduced via stochastic operators x r nj [4,20,22,24]. We impose only the obvious restriction condition:…”

Section: Article In Pressmentioning

confidence: 99%

“…The studies of the last decade commercialised giant magnetoresistant layered materials (GMR) significantly. Now, it is well known that the magnetisation behaviour in the interface region is one of the most important features, but its knowledge still needs further investigations [2][3][4][5][6][7]. Already two decades ago, Wimmer, Freeman, Fu, Erskine and others showed us the existence of 2D-interface magnetism instead of surface (and interface) magnetically ''dead'' layers suggested earlier by theoreticians but not found by experimentalists [8][9][10].…”

Section: Introductionmentioning

confidence: 98%

“…Thus, we present our analytical results of oneatom cluster approximation (1-ACA) based on the exact Callen equations extended for the case of stochastic spin-1 2 and spin-1 alloy structure in the form of trilayer systems [4,20,21]. The method is superior to the standard molecular field approach and thus it is particularly well suited for the description of mixed-spins as well as layered systems [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…It allowed us to describe the thermal reversal of magnetisation profiles in thin Fe-films in the case when the concentration of surface highspin component did not exceed the critical value that has been well defined according to the discussed T cr 2c phase diagram [20]. Further, we analysed also the variation of magnetisation depth profiles in heterostructure bilayer systems [4]. Below, the thermal variation of MDP across magnetic-nonmagnetic trilayer structure shows us the possibility of the existence of complex enhanced magnetic phases in the interface region.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Magnetisation depth profiles in trilayer systems with mixed–spin interfaces—a contribution to temperature dependent GMR-potentials

Wiatrowski

Baldomir

Warda

et al. 2004

Journal of Magnetism and Magnetic Materials

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Section: Article In Pressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetisation depth profiles in trilayer systems with mixed–spin interfaces—a contribution to temperature dependent GMR-potentials

Wiatrowski

Baldomir

Warda

et al. 2004

Journal of Magnetism and Magnetic Materials

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“…We analysed also the variation of MDP in heterostructure bilayer systems [21]. Below, we show the contribution of the variation of MDP across the magnetic-nonmagnetic D218 Role of spin mixing at interface trilayer structure and the interface spin-mixing influence on GMR effects obtained by the Boltzmann equation in the frame of the extended Hood-Falicov theory presented in [22,23].…”

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confidence: 99%

Role of Spin Mixing at Interface

Warda¹,

Wojtczak²,

Wiatrowski³

et al. 2004

Czech J Phys

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The system of two ferromagnetic layers separated by normal metal film is studied. In particular, the role of interface is considered in the context of its bilayer structure which is treated as a region consisting of two mixed different magnetic moments determined by different spins. The local magnetization and the local potential exhibit the enhancement or decrement with respect to the average magnetization and the potential barrier inside ferromagnetic layers. The effect depends on the mutual concentration of two components distributed in interface layers. The results show the variation of the magnetoresistance value due to the spin mixing at the interface region. PACS : 75.70.PaUnderstanding the magnetic properties of multilayers (ML) structures is a central issue in modern study of magnetic materials. The recent intense research both theoretical and experimental has shown their particular importance in nanoscience and nanotechnological applications. We still notice a large number of papers devoted to investigations of various static properties (collinear and non-collinear spin structures [1], role of magnetic anisotropies, exchange couplings, magnetic susceptibilities [2]) as well as dynamic problems like e.g. spin wave behaviour in layered magnetic materials [3] with particular attention paid to the state and role of interface region contribution. One of the reasons of certain contradictions obtained even by similar methods when applied to investigate the magnetic properties of Fe/Cr ML is the sensitivity of these structures to the interface morphology and its dependence on the details of preparation conditions [4]. Theoretical studies including interface roughness and inter-diffusion processes showed a number of complex energetic structures with metastable self-consistent solutions characterized by very similar energies [5]. Fe/Cr/Fe trilayers were among the first to indicate the interplay between interfacial disorder and antiferromagnetic order in Cr leading to the effect of frustration, which modifies the interlayer coupling in an unexpected way [6]. * ) Presented at 12

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Ferrimagnetism in the Heisenberg–Ising bilayer with magnetically non-equivalent planes

Balcerzak

Szałowski

2014

Physica A: Statistical Mechanics and its Applications

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The Pair Approximation method is applied to the antiferromagnetic Heisenberg-Ising spin-1/2 bilayer with a simple cubic crystalline structure. The method allows for self-consistent calculations of thermodynamic quantities, based on the determination of Gibbs free-energy. In the paper the phase diagrams and planar magnetizations are calculated for the system in question. Special attention is paid to the case of magnetically non-equivalent planes, one of which is additionally randomly diluted. The occurrence of a compensation phenomenon is found and the compensation temperature is discussed for such a system. The characteristic concentration of magnetic atoms p , below which the compensation phenomenon vanishes, is examined as a function of the Hamiltonian parameters.

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Magnetic properties of bilayers with a mixed-spin interface

Cited by 5 publications

References 19 publications

Magnetisation depth profiles in trilayer systems with mixed–spin interfaces—a contribution to temperature dependent GMR-potentials

Magnetisation depth profiles in trilayer systems with mixed–spin interfaces—a contribution to temperature dependent GMR-potentials

Role of Spin Mixing at Interface

Ferrimagnetism in the Heisenberg–Ising bilayer with magnetically non-equivalent planes

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