[Wien] (no subject)

[Gavin Abo]

Someone else may know differently, but as far as I know, WIEN2k has no 
function for calculating MR (magnetoresistance).

I don't know the details of what your are trying to do exactly, but it 
may be that WIEN2k's magnetic field doesn't do what you think it does.

Refer to the previous posts:

https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg16108.html

https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg11093.html

For example a VSM with Magneto Resistance option can only apply up to 
3.5 T [ http://www.microsense.net/products-vsm.htm ].  Some of the best 
electromagnets in the world cannot apply too much higher magnetic fields 
than that.  In the above post, at least a 10 T magnetic field has to be 
applied to even see an effect. However, I don't know how to properly 
explain that.  My guess is that might be because WIEN2k's magnetic field 
is an atomic local field instead of a micro/macro uniform field.

Do you maybe need a spin-polarized current in a spin-torque based 
micromagnetic simulator like oommf [ https://math.nist.gov/oommf/ ,  
http://layer.uci.agh.edu.pl/M.Frankowski/download.html ], LLG 
Micromagnetic Simulator [ 
http://llgmicro.home.mindspring.com/DataRep/HysAndMRLoops/HysAndMrFrame.htm 
], or VAMPIRE [ http://vampire.york.ac.uk/research/ ]?

Or are you trying to calculate magnetic anisotropy energy (MAE) [ 
https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg09408.html 
]?

I never figured out how to do it, but tunneling current is a function of 
density of states, fermi functions, and tunneling probability [ 
http://dx.doi.org/10.9756/BIJPSIC.3129 ].  So I thought there might be a 
slight possibility to extract data from WIEN2k and post calculate that.

Hope that can help and good luck.

On 5/22/2018 9:21 AM, sudipta wrote:
> I want to calculate anisotropy in magnetoresistance. I want to to 
> apply both magnetic field and current at same time to a system. In 
> wien2k through inorb
> I can apply magnetic field, but how to give current at the same time.
>
> -- 
> Sudipta koley
> Department of Physics
> IIT KHARAGPUR

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