Dear Sushmita Dey,

I recommend you check it out yourself. To do this, use a copper block as a sample. Perform measurements as usual.

Most likely the temperature changes in the field you will not find on the copper block. However, the iron wire can move in a magnetic field, which can cause electromagnetic noise.

Typically, a K type thermocouple is used for such measurements.

I wish you success!

Respectfully,

Yuri

Thank you for your answer Prof. Koshkid'ko. But still how can we completely rule out the fact that the temperature of the thermocouple does not change with the change in magnetic filed. Also pleasse note, that temperature change was measured with increasing temperature at an interval of 5 K each in a magnetic field change of 0.1 T.

Dear Sushmita Dey,

I think significant changes in the temperature of a thermocouple in a magnetic field can manifest themselves only in the region of the Curie temperature of iron ( 1043 К). Also, I think we should not exclude the effect of magnetic resistance. Therefore, I recommend that you take measurements without a sample or use a copper block as a sample. If the changes are significant, I recommend that you use a different type of thermocouple. In my opinion, the greatest problem may be the movement of the iron wire in a magnetic field. As you know, the thermocouple is a j-type composed of iron and constantan wires.

The temperature interval should not affect the measurement results.

In turn, the 0.1 T field is very small for observing a significant magnetocaloric effect. In this case, the demagnetizing factor of the sample must be taken into account.

Respectfully,

Yuri