[Wien] Magnetism of dilute alloys

[Bin Shao]

Dear Stefaan,

I note that the value RMT = 2.25 in my calculation FeZn35 and the value is
generated automatically according the structure parameters of the system. In
my opinion, the limitation of the value is zero, in my opinion, the
calculation equates to VASP in this case.

My question is whether the value RMT will effect the magnetism property of a
metal system? How to choose the value of RMT?

Best wishes,

Bin Shao

On Fri, May 14, 2010 at 1:20 PM, Stefaan Cottenier <
Stefaan.Cottenier at ugent.be> wrote:

>
> Probably the magnetism got lost during your vasp calculation. Is it
> possible to do fixed-spin-moment calculations in vasp? If so, do the vasp
> calculation with a fixed moment of 2.5 mu_B, and use the result of the
> latter calculation as starting point of a regular vasp scf-cycle.
>
> Another way to convince you about the feasibility of the magnetic result in
> wien2k, is to make a nonmagnetic calculation for this system by wien2k. Is
> the energie larger or smaller than the energy of the magnetic result? (once
> you have the magnetic and nonmagnetic energies with both codes, you can even
> compare the energy difference for the two codes).
>
> Stefaan
>
>
>
> Bin Shao wrote:
>
>> Dear wien2k users,
>>
>> I am running wien version 9.2 on a machine of type cluster with operating
>> system Centos 5.4, fortran compiler ifort and math libraries intel mkl.
>>
>> The purpose of my calculations in to get the magnetic property of Fe doped
>> Zn. I generate the structure of FeZn35 by using the lattice parameter of
>> pure Zn and making a supercell of 2x2x2, then substitutes a Zn atom with Fe
>> atom. I use the exchange correlation of PBE-GGA and klist 11x11x11.
>>
>> In the process, I don't adopt any new structures provided in the Wien
>> script _/initialize calc./_ and run the program by command line.
>>
>> After the scf calculation, it comes to that the system is magnetic with
>> 2.54149 bohr magnetic moment.
>>
>> However, I did a calculation using another DFT software VASP with the same
>> lattice parameter, the same exchange correlation, except k-mesh. In the
>> VASP, the k-mesh is 8x8x8. But the result of VASP shows the system is
>> nonmagnetism.
>>
>> Although in the calculations I did before, the results of the two software
>> have something different within 0.1 bohr magnetic moment. The huge
>> difference of the above result puzzled me.
>>
>> Any suggestion will be greatly appreciated! Thanks in advanced.
>>
>> Best regards,
>>
>>
>> --
>> Bin Shao
>> College of Information Technical Science, Nankai University
>> 94 Weijin Rd. Nankai Dist. Tianjin 300071, China
>> Email: binshao1118 at gmail.com <mailto:binshao1118 at gmail.com>
>>
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> Wien mailing list
>> Wien at zeus.theochem.tuwien.ac.at
>> http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
>>
>
> _______________________________________________
> Wien mailing list
> Wien at zeus.theochem.tuwien.ac.at
> http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
>



-- 
Bin Shao
College of Information Technical Science, Nankai University
94 Weijin Rd. Nankai Dist. Tianjin 300071, China
Email: binshao1118 at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://zeus.theochem.tuwien.ac.at/pipermail/wien/attachments/20100518/b49c42ef/attachment.htm>