Invitation: Micromagnetic Simulation With Mumax 3 and Vampire 4

[Oreci Escobar da Silva]

Project: This project aims to study the dynamics of reversal of micromagnetic magnetization in both ferromagnetic materials and FM/AFM bilayers that present the phenomenon of Exchange Bias. Using the micromagnetic simulation program (Mumax3, Vampire or Others), we will build a database from micromagnetic simulations varying several parameters, in order to support future research in the area of ​​magnetism and micromagnetism. MuMax3 is an open source software written in GO and CUDA, and is available for free under the GPLv3 license at http://mumax.github.io. In addition to the terms of the GPL, the creators kindly requested that any work using MuMax3 should refer to the latest site and to the article https://doi.org/10.1063/1.4899186. An nVIDIA GPU and a Windows platform were required to run the software. In addition to the nVIDIA GPU driver, no other dependencies were required to run MuMax3, which will be used in this work. Vampire (http://vampire.york.ac.uk/tutorials/) is a high performance general purpose code for the atomistic simulation of magnetic materials. Using a variety of common simulation methods it can calculate the equilibrium and dynamic magnetic properties of a wide variety of magnetic materials and phenomena, including ferro, ferri and antiferromagnets, core-shell nanoparticles, ultrafast spin dynamics, magnetic recording media, heat assisted magnetic recording, exchange bias, magnetic multilayer films and complete devices (By Richard Evans).

Researchers interested in being part of this scientific dissemination project will be welcome.

Contact: https://www.researchgate.net/project/Micromagnetic-Simulation-With-Mumax-3-and-Vampire-4

[Siraj Ulhaq]

Helo Oreci Escobar da Silva 

hi i need your  help little will you plz send me input file for exchange bias in FeMn by vampire  and also how to include the 3D spin structure effect of FeMn and NiMn on EB in the VAMPIRE code.and how can one include the Mn magnetic moment 3.8 uB and ignore the Ni magnetic moment in NiMn in vampire .one last thing is how to include all the energy terms in the VAMPIRE code you put now only exchange matrix and don't put FM and AFM magnetic anisotropy and interfacial energy term...............

[Oreci Escobar da Silva]

Dear Siraj Ulhaq,

I'm working with AFM materials similar to yours, I have not yet worked with Exchange Bias in Vampire (I'll soon do that), but on the vampire site there's an FM / AFM example, just follow the template ... You have to find the atomic-spin-moment of your materials, or you consider them separate or together. To put the other terms of energy follows the attached manual, but it is the same thing:

material: uniaxial-anisotropy-constant = fl oat [default 0.0 J / atom]

material: second-uniaxial-anisotropy-constant = fl oat [default 0.0 J / atom]

material: cubic-anisotropy-constant = fl oat [default 0.0 J / atom]

material: uniaxial-anisotropy-direction = fl oat vector [default (001)]

material: surface-anisotropy-constant = fl oat default 0.0 (J / atom)

material: relative-gamma fl oat [default 1]

material: initial-spin-direction fl oat vector / bool [default (001) / false]

See also: https://github.com/richard-evans/vampire

Are you part of ResearchGate? If so, follow my project there ...

[Siraj Ulhaq]

 i am working on vampire to find exchange bias in bilayer .i have some problems discuss below:

1) How to implement FCT crystal structure ?

2) How to include other energy terms other than exchange matrix?

3) How to include 3D spin structure of AFM?

4) How to include concentration of AFM or FM in case it is in alloy?

plzz help me out regarding the above problems 

[Siraj Ulhaq]

hi helo will you plz share with me your thesis in english version

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[Oreci Escobar da Silva]

Dear Siraj!

At the moment I only have the Portuguese version, but I intend to translate it soon into English in the form of a book.

https://www.researchgate.net/profile/Oreci_Da_Silva