Advanced Magnetic Materials

Małkiński, L.

doi:10.5772/2298

Cited by 14 publications

(1 citation statement)

References 32 publications

(39 reference statements)

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“…Such models include the Ishlinskii operator (a continuum limit of the system consisting of a family of stops) and Preisach models (a continuum limit of the system consisting of a family of non-ideal relays) [1,[4][5][6][7][8][9][10][11][12][13][14][15][16][17]. At the same time, there is an alternative approach using the phenomenological models such as the Bouc-Wen model, Iwan model, Duhem model, etc [18][19][20][21][22][23]. The above models are formalized in terms of low-dimensional systems of ordinary differential equations and are convenient tool for studying the dynamics of systems with hysteresis.…”

Section: Introductionmentioning

confidence: 99%

The Preisach model of hysteresis: fundamentals and applications

Semenov,

Borzunov,

Meleshenko

et al. 2024

Phys. Scr.

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The Preisach model is a well-known model of hysteresis in the modern nonlinear science. This paper provides an overview of works that are focusing on the study of dynamical systems from various areas (physics, economics, biology), where the Preisach model plays a key role in the formalization of hysteresis dependencies. Here we describe the input-output relations of the classical Preisach operator, its basic properties, methods of constructing the output using the demagnetization function formalism, a generalization of the classical Preisach operator for the case of vector input-output relations. Various generalizations of the model are described here in relation to systems containing ferromagnetic and ferroelectric materials. The main attention we pay to experimental works, where the Preisach model has been used for analytic description of the experimentally observed results. Also, we describe a wide range of the technical applications of the Preisach model in such fields as energy storage devices, systems under piezoelectric effect, models of systems with long-term memory. The properties of the Preisach operator in terms of reaction to stochastic external impacts are described and a generalization of the model for the case of the stochastic threshold numbers of its elementary components is given.

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Section: Introductionmentioning

confidence: 99%

The Preisach model of hysteresis: fundamentals and applications

Semenov,

Borzunov,

Meleshenko

et al. 2024

Phys. Scr.

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Room temperature multiferroicity in orthorhombic LuFeO3

Chowdhury

Goswami

Bhattacharya

et al. 2014

Applied Physics Letters

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From the measurement of dielectric, ferroelectric, and magnetic properties we observe simultaneous ferroelectric and magnetic transitions around ∼600 K in orthorhombic LuFeO 3 . We also observe suppression of the remanent polarization by ∼95% under a magnetic field of ∼15 kOe at room temperature. The extent of suppression of the polarization under magnetic field increases monotonically with the field. These results show that even the orthorhombic LuFeO 3 is a room temperature multiferroic of type-II variety exhibiting quite a strong coupling between magnetization and polarization.PACS numbers: 75.80.+q, 75.75.+a, 77.80.-e The magnetoelectric multiferroics with strong crosscoupling between ferroelectric and magnetic order parameters have attracted a lot of attention during the last one decade because of their potential in radically enhancing the functionalities of the spintronics-based devices for many, including bio-medical, applications. 1 A room temperature multiferroic, for obvious reasons, is always the most sought-after compound. Apart from BiFeO 3 , other systems such as CuO3] have also been identified as potential high temperature multiferroic compounds. In recent time, hexagonal LuFeO 3 is found to exhibit multiferroicity at room temperature. 4 Coexistence of ferrimagnetic and ferroelectric orders was reported in orthorhombic LuFe 1−x Mn x O 3 as well. 5 However, in none of these recent work direct measurement of the multiferroic coupling has been attempted. In this Letter, we show that even the pure orthorhombic-LuFeO 3 , in bulk form, exhibits large magnetoelectric multiferroic coupling at room temperature. The remanent polarization (P r ) is suppressed by ∼95% under a magnetic field of ∼15 kOe. The extent of suppression of P r increases monotonically with the increase in magnetic field. The ferroelectric and magnetic transitions are simultaneous around ∼600 K indicating magnetic structure driven ferroelectricity. This observation signfies that the orthorhombic LuFeO 3 is a multiferroic of type-II variety.The structurally nonpolar orthoferrites such as SmFeO 3 , YFeO 3 , LuFeO 3 etc. exhibit small yet finite ferroelectric polarization because of noncollinear spin structure with canted antiferromagnetic order. [6][7][8] This magnetic order induces a spin current 9 via spinorbit-coupling driven antisymmetric exchange interaction along the Fe 3+ -O 2− -Fe 3+ pathway. The spin current ( j s ) in such a noncollinear magnetic structure breaks the a) Electronic mail: dipten@cgcri.res.in centrosymmetry of the electronic charge density distribution and yields a finite polarization ( P ∝ j s ). 9,10 These compounds, where magnetism drives ferroelectricity, belong to the type-II category of the multiferroics. Interestingly, unlike the well-known perovskite manganites such as TbMnO 3 or DyMnO 3 , the rare-earth orthoferrites exhibit the ferroic transitions at well above the room temperature. In fact, for many of these orthoferrites, the magnetic and ferroelectric transition points (T N and T C , respectively) ar...

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Generation of pure spin currents via spin Seebeck effect in self-biased hexagonal ferrite thin films

Ellsworth

Chang

Janantha

et al. 2014

Applied Physics Letters

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Self-biased planar millimeter wave notch filters based on magnetostatic wave excitation in barium hexagonal ferrite thin films Appl. Phys. Lett. 97, 173502 (2010); 10.1063/1.3504256Electric detection of the spin-Seebeck effect in ferromagnetic metals (invited)Light-induced generation of pure spin currents in a Pt(2.5 nm)/BaFe 12 O 19 (1.2 lm)/ sapphire(0.5 mm) structure is reported. The BaFe 12 O 19 film had strong in-plane uniaxial anisotropy and was therefore self-biased. Upon exposure to light, a temperature difference (DT) was established across the BaFe 12 O 19 thickness that gave rise to a pure spin current in the Pt via the spin Seebeck effect. Via the inverse spin Hall effect, the spin current produced an electric voltage across one of the Pt lateral dimensions. The voltage varied with time in the same manner as DT and flipped its sign when the magnetization in BaFe 12 O 19 was reversed. V C 2014 AIP Publishing LLC.

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Advanced Magnetic Materials

Cited by 14 publications

References 32 publications

The Preisach model of hysteresis: fundamentals and applications

The Preisach model of hysteresis: fundamentals and applications

Room temperature multiferroicity in orthorhombic LuFeO3

Generation of pure spin currents via spin Seebeck effect in self-biased hexagonal ferrite thin films

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