In the constant-Q energy scan of the inelastic neutron measurements (INS), there is one peak when energy gap emerges. What is the physical meaning of such peak width? In a few systems, I noticed the width of the INS peak becomes much broader when the low-T triangular AFM ordering changes collinear AFM ordering at higher temperature. What does the broaden peak-width mean? It seems that is not just the thermal/temperature effect and I speculate that the spin dynamic must be changed in these two magnetic structures. Could anybody give me some advice and even some literatures? Thank you very much for your help in advance!
Dariush Montasserasadi
1- how we can measure spin gap from SQUID data?
2-what is spin gap? INS?
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