Magnetic switching dynamics due to ultrafast exchange scattering: A model study

Straintronic principle of nonvolatile magnetoelectric random access memory (MELRAM) draws much attention due to the prospects of ultra-low energy consumption in storage devices. The switching of magnetic moments by pulsed deformation of elastically coupled magnetic and piezoelectric subsystems is accompanied by excitation of acoustic oscillations in the memory cells. Oscillation period in nanoscale cells is comparable with the magnetic moment switching time, which can affect the information recording process. In the present paper the influence of acoustic excitations on the magnetic switching dynamics is studied by numerical modeling with application to a magnetostrictive cell 50×50×400 nm3 on a PMN-PT <011> substrate. Parameters of voltage control pulses that can insure reliable switching of magnetic states of the system are determined.

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Thickness Dependence of Magnetic Switching Dynamics of Barium-Ferrite as A High-Density Perpendicular Magnetic Storage Media

Jurnal Pendidikan Fisika Indonesia ◽

10.15294/jpfi.v13i2.8499 ◽

2017 ◽

Vol 13 (2) ◽

pp. 112-118 ◽

Cited By ~ 1

Author(s):

P. P. Aji ◽

F. S. Rondonuwu ◽

N. A. Wibowo

Keyword(s):

Domain Wall ◽

Barium Ferrite ◽

Thickness Dependence ◽

Magnetic Storage ◽

Magnetization Dynamics ◽

Excellent Thermal Stability ◽

Storage Media ◽

Magnetic Switching ◽

Switching Dynamics ◽

Magnetic Storage Media

Micromagnetic study of material thickness dependence of Barium-ferrite nano-dot magnetization dynamics has been performed. The used materials characteristics in this research represent the properties of Barium-ferrite. Barium-ferrite was modeled as a nano-dot with a surface area of 50 50 nm2 and its thickness varies from 5 nm to 100 nm. This nano-dot was simulated using micromagnetic simulator software by solving Landau-Lifshitz-Gilbert equation. According to this study, obtained that the Barium-ferrite nano-dot has excellent thermal stability. Magnetization rate of this nano-dot decreases exponentially with the increase of thickness. The fastest magnetization rate observed in 5 nm of nano-dot thickness, meanwhile 45 nm for the slowest rate. Magnetization reversal mode of this Barium-ferrite nano-dot is dominated by domain wall nucleation and propagation. During the propagation of the domain wall, the exchange interaction becomes the main aspect compared to the other contributed energies.

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Social Desirability in Personality Inventories

Journal of Individual Differences ◽

10.1027/1614-0001/a000138 ◽

2014 ◽

Vol 35 (3) ◽

pp. 144-157 ◽

Cited By ~ 12

Author(s):

Martin Bäckström ◽

Fredrik Björklund

Keyword(s):

Social Desirability ◽

Big Five ◽

Work Performance ◽

Factor Model ◽

Five Factor Model ◽

Peer Ratings ◽

Personality Inventories ◽

Model Study ◽

The Difference ◽

New Variables

The difference between evaluatively loaded and evaluatively neutralized five-factor inventory items was used to create new variables, one for each factor in the five-factor model. Study 1 showed that these variables can be represented in terms of a general evaluative factor which is related to social desirability measures and indicated that the factor may equally well be represented as separate from the Big Five as superordinate to them. Study 2 revealed an evaluative factor in self-ratings and peer ratings of the Big Five, but the evaluative factor in self-reports did not correlate with such a factor in ratings by peers. In Study 3 the evaluative factor contributed above the Big Five in predicting work performance, indicating a substance component. The results are discussed in relation to measurement issues and self-serving biases.

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