Ferromagnetic-NSE study of the low-frequency spin-dynamical signature of the INVAR effect in Fe65Ni35
The origin of the INVAR effect - near zero thermal expansion around room temperature in certain ferromagnetic alloys - is still not properly understood. Although the phenomenological two state model proposed by Weiss, where thermal population between two different spin states of high and low volumes can be used to explain the curious thermal expansion, there has been no direct observation to corroborate the theory. Recently many studies have involved the use of electronic structure calculations using many different techniques, many of which infer that disorder, either in the magnitude of the local moments, or in the degree of collinearity plays a role in the phenomena observed in these systems. The proposed experiment seeks to probe low-frequency spin-dynamics in INVAR alloy (Fe65Ni35) in order to verify an interesting spin-dynamical signature of the INVAR effect, recently seen in muon spectroscopy studies.
Please note that you will need to login with your ILL credentials to download the data.
Download DataThe recommended format for citing this dataset in a research publication is in the following format:
TAYLOR Jonathan; FOUQUET Peter; GIBLIN Sean; GOFF Jonathan P.; PASQUINO Giovanni and STEWART John Ross. (2012). Ferromagnetic-NSE study of the low-frequency spin-dynamical signature of the INVAR effect in Fe65Ni35. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1111
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.