Curie temperature

[Shabeer ali pc]

Hi all.

Iam a beginner to vampire.

What should be the unit of M and T in Curie temperature graph. i have attached all input files below and MT graph also. Is it Magnetization in muB and temperature is in degrees celsius 

 if so How can I convert the before unit into emu/g for M  and Kelvin for Temperature??

Appreciation for any kind of help, Thankyou.

Thanks & Regards.

[gabo...@gmail.com]

When I went through the Ni example, see the post at [1], VAMPIRE gave the temperature in units of Kelvin.  Also, the mean-magnetisation-length <|m|> [2] was also used for the plot.  Although, plotting as |m|*m-hat, as described at [3], may be of interest to you.

If you want to convert from Kelvin to degrees Celsius, you just need to subtract the Kelvin value by 273.15 [4].

The |m|*m-hat I think was unitless (normalized to 1).  Therefore, if you want M to have units, I believe you have to multiply it by a saturation magnetization Ms value for your material that is often times in units of emu/cm^3.  If you want to convert emu/cm^3 to emu/g, then you would need the material's density [5] in g/cm^3.

With a Vibrating Sample Magnetometer (VSM), Ms can be measured in emu and volume (cm^3) can be obtained by measuring the area and thickness of the sample.  From that, Ms in emu/cm^3 can be computed [6].  Alternatively, emu/g can be obtained in a similar way but the sample's weight (g) is used instead.

[1] https://groups.google.com/g/vampire-users/c/LS51ZlvZeyw/m/3gljoW54AwAJ

[2] https://groups.google.com/g/vampire-users/c/ANjHmqhCXZk/m/6_86KD2ZBAAJ

[3] https://groups.google.com/g/vampire-users/c/eRk1_-iAw_Q/m/QbOuF-_0BQAJ

[4] https://www.thoughtco.com/convert-kelvin-to-celsius-609233

[5] https://socratic.org/chemistry/measurement-in-chemistry/density

[6] https://www-users.york.ac.uk/~ah566/lectures/vsm.pdf

Kind Regards,

Gavin

VAMPIRE user

On Thursday, May 23, 2024 at 10:52:24 PM UTC-6 shabeera...@gmail.com wrote:

Hi all.

I am a beginner to vampire.