Temperature dependence of relaxation time T1 vs T2

[qwerasadf]

Hi,
when we assume a obejct with increasing dynamics with increasing temperature, the longitudinal relaxation time T1 should decrease. Since we have, let's say at a frequency 100 MHz , more fluctuations of B₀.

Ok, then the transversal relaxation time T2 must increase with increasing temperature, right? Because T2 depends on the spectral density at j(0) (zero frequency). so when there is a increasing dynamic, the zero-frequency-motion-ometer (=T2) must decrease. Is it right?

I know there is also a j(100MHz) contribution within T2, but let's assume that's negligible.

Thanks a lot, sorry for bad english!

 

[DrClaude]

Could you please give the context of your question?

 

[qwerasadf]

Hi, DrClaude,

Its about the investigation of Relaxor ferroelectrics with NMR relaxation time.

 

[mfb]

so when there is a increasing dynamic, the zero-frequency-motion-ometer (=T2) must decrease.

I don't understand the argument here.

 

[qwerasadf]

In this picture we can see the spectral density with different frequencies. If there are are high dynamics => shorter correlation time => frequency distribution becomes broader. the dashed lines is referred to the T1 relaxation time. T2 is at 0Hz. Thus, increasing dynamics lead to low T2, right?

 

[mfb]

The energy density for every frequency increases with temperature.