Challenges and opportunities: The magnetic media industry in the 1990s

Lueck, L.; Gilson, R.G.

doi:10.1016/s0304-8853(97)90032-9

Cited by 16 publications

(3 citation statements)

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“…For example, the models consisting of mixed spins with different magnitudes are interesting extensions, forming the so-called mixed-spin Ising class [1,2]. Beyond that, magnetic materials have several important technological applications: they find wide use in information storage devices, microwaves communication systems, electric power transformers and dynamo, and high-fidelity speakers [3][4][5][6]. Thus, in response to an increasing demand placed on the performance of magnetic solids, there has been a surge of interest in molecular-based magnetic materials [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Bethe approach study of the mixed spin-1/2 and spin-5/2 Ising system in the presence of an applied magnetic field

Karimou¹,

Yessoufou²,

Oke³

et al. 2016

Condens. Matter Phys.

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The mixed spin-1/2 and spin-5/2 Ising model is investigated on the Bethe lattice in the presence of a magnetic field h via the recursion relations method. A ground-state phase diagram is constructed which may be needful to explore important regions of the temperature phase diagrams of a model. The order-parameters, the corresponding response functions and internal energy are thoroughly investigated in order to typify the nature of the phase transition and to get the corresponding temperatures. So, in the absence of the magnetic field, the temperature phase diagrams are displayed in the case of an equal crystal-field on the (k B T /|J |, D/|J |) plane when q = 3, 4, 5 and 6. The model only exhibits the second-order phase transition for appropriate values of physical parameters of a model.

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Section: Introductionmentioning

confidence: 99%

Bethe approach study of the mixed spin-1/2 and spin-5/2 Ising system in the presence of an applied magnetic field

Karimou¹,

Yessoufou²,

Oke³

et al. 2016

Condens. Matter Phys.

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“…The investigation of mixed Ising systems has been of great interest in statistical mechanics during the past decades [1][2][3][4]. This is due to the revelation of novel critical magnetic properties not detected during studies of their single-spin counterparts.…”

Section: Introductionmentioning

confidence: 99%

Bethe lattice approach study of the mixed spin-1/2 and spin-7/2 Ising model in a longitudinal magnetic field

Eddahri¹,

Karimou²,

Razouk³

et al. 2018

Condens. Matter Phys.

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The magnetic properties of the mixed spin-1 2 and spin-7 2 Ising model with a crystal-field in a longitudinal magnetic field are investigated on the Bethe lattice using exact recursion relations. The ground-state phase diagram is constructed. The temperature-dependent one is displayed in the case of uniform crystal-field on the (k B T/|J |, D/|J |) plane in the absence of the external constraint for lattice coordination numbers z = 3, 4, 6.The order parameters and corresponding response functions as well as the internal energy are calculated and examined in detail in order to feature the real nature of phase boundaries and corresponding temperatures. The thermal variations of the average magnetization are classified according to the Néel nomenclature.

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“…Beyond that, magnetic materials have numerous and important technological applications: They find wide use in information storage devices, microwaves communications systems, electric power transformers and dynamo and high-fidelity speakers. [1][2][3][4] Thus, in response to the increasing demands being placed on the performance of magnetic solids, there has been a surge of interest in molecular-based magnetic materials. [5][6][7][8] Indeed, the discovery of these materials 9 has been one of the advances in modern magnetism.…”

Section: Introductionmentioning

confidence: 99%

Critical behaviors and phase diagrams of the mixed spin-1 and spin-7/2 Blume-Capel (BC) Ising model on the Bethe lattice (BL)

Karimou

Yessoufou

Hontinfinde

2015

Int. J. Mod. Phys. B

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Using the recursion equations technique, the influences of the single-ion anisotropies or crystal-fields interactions on the magnetic properties of the mixed spin-1 and spin-7/2 Blume-Capel (BC) Ising ferrimagnetic system are studied on the Bethe lattice (BL). The ground-state phase diagram is constructed, the thermal behaviors of the orderparameters and the free-energy are thoroughly investigated in order to characterize the nature of the phase transitions and to obtain the phase transition temperature. Then, the temperature phase diagrams are obtained in the case of equal crystal-field interactions on the (kT /|J| and D/|J|) planes when q = 3, 4 and 6 and in the case of unequal crystal-fields interactions on the (kT /|J| and D A /|J|) and (kT /|J| and D B /|J|) planes for selected values of D B /|J| and D A /|J| respectively when q = 3. The model shows first-order and second-order phase transitions, and where the lines are connected is the tricritical point. Besides the first-order and second-order phase transitions, the system also exhibits compensation temperatures depending on appropriate values of the crystalfields interactions.

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Challenges and opportunities: The magnetic media industry in the 1990s

Cited by 16 publications

References 0 publications

Bethe approach study of the mixed spin-1/2 and spin-5/2 Ising system in the presence of an applied magnetic field

Bethe approach study of the mixed spin-1/2 and spin-5/2 Ising system in the presence of an applied magnetic field

Bethe lattice approach study of the mixed spin-1/2 and spin-7/2 Ising model in a longitudinal magnetic field

Critical behaviors and phase diagrams of the mixed spin-1 and spin-7/2 Blume-Capel (BC) Ising model on the Bethe lattice (BL)

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