The magnetic property of my sample were analysed VSM (vibrating sample magnetometer). These sample magnetic properties were analysed at applied field 10,000 (Koe). but i see Hysteresis loop in (2000 until -2000) (From 2000 to the gentle slope)
its good or bad??
Whatever the magnetic property appears in small field better or higher?
whats different my sample ( that in field 2000 Koe have Hysteresis loop) with sample ( that in field 10000 Koe have Hysteresis loop)?
The magnetic flux density relates to the magnetic properties via:
B= u0(M+H)
where u0 is a constant, M is the magnetization of the samples and H is the applied field.
First, I don't believe the field of 10000 kOe (not koe) ~1000 T(esla) is used to conduct measurements using VSM apparatus. Thus I assume the units are Oe, not kOe. According to the given description, the sample is ferromagnetic (at least significant part of the sample is ferromagnetic). This is almost certainly not a soft magnetic material. Almost certainly, since we don't know its coercivity. We don't know neither whether the sample is a single crystal, powder, alloy or layered structure nor what is its shape (wire, plate, sphere, or still other). 'Gentle slope' at high field is a hint that the field was oriented not along the easy axis. Otherwise everything looks 'normal', neither good nor bad.
I agree with Marek, 1000 T field is quite weird! And the slope at high field may indicate that the field is not along the easy axis of the material, provided it is a single crystal. Most of the domains are ferromagnetically aligned, giving hysteresis loop, the gentle slope does say that all of them are not aligned, else you would get a field independence. Now it does not mean anything for a sample to be good or bad--it is showing what it has and supposed to show..
I think a photo of your results will be beneficial for all to give a reasonable understanding and explanation.
Hello Fatemeh Sadegh !
This depends on what you want to analyze, if the sample has rotational hysteresis for high fields, a higher field (10000 Oe) will give you an idea of how hysteresis evolves, at low fields (2000 Oe), you only have cycle information of hysteresis itself, coercive field, remanence magnetization, but will its sample be saturated after 2000 Oe? In doubt always use high fields, one suggestion is to vary the field from 2 kOe to 2 kOe and observe what happens, shape the curve, decrease or increase the coercive field. So it depends a lot on the property being analyzed.
Hellow Fatemeh Sadegh !
I agree with Marek Wojciech Gutowski. First the field 10000 kOe is looking quite strange and impossible in conventional PPMS (VSM). It will be 10000 Oe(i.e. 1T).
Regarding behavior of the hysteresis loop, It will be better to have a screen shot of the M(H) curve in order to analyze the behavior both in low field as well as high magnetic field regime.
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