- I am working on perovskite oxides and am stuck with discrepencies in the effective magnetic moment of my compound from C-W fit as compared to theoretical magnetic moment with various spin states. I would like to know, if there are certain experimental techniques (measurements) from which we may be able to deduce spin state. My compound contains Fe, Co and Ru.
Dear Mahima, the following research article might be useful in this context:
Spinning around in Transition-Metal Chemistry
Article Spinning around in Transition-Metal Chemistry
In the Introduction section of this article several experimental methods are outlined. Unfortunately the paper has not yet been posted as public full text. However, the corresponding author has an RG profile (https://www.researchgate.net/profile/Maja-Gruden). Thus you can contact her via RG and request the full text. In my experience most authors respond rather quickly to such full text requests.
Also please have a look at the following potentially useful papers:
Spin State Control of the Perovskite Rh/Co Oxides
Article Spin State Control of the Perovskite Rh/Co Oxides
and
Spin-State Regulation of Perovskite Cobaltite to Realize Enhanced Oxygen Evolution Activity
Article Spin-State Regulation of Perovskite Cobaltite to Realize Enh...
Thie first article is freely available as public full text on RG.
Good luck with your work and best wishes!
Dear Mahima,
As Prof. Edelmann already pointed out there are some very good articles on the topic. However, I additionally recommend to use Mössbauers spectroscopy for Fe and eventually Ru, which can reveal the oxidation state of the respective ions.
The electronic ground state can be monitored by EPR spectroscopy and/or measuring the temperature dependence of the magnetic susceptibility, e.g. by SQUID. In addition to that optical spectroscopy can be used, if the TM ions are in a host/matrix which is transparent in the range of the absorption lines /bands of the ions.
A good review on Mössbauer spectroscopy can be found under the following DOI 10.1002/zaac.201100416
All the best for your research,
Thomas
Thankyou Prof. Thomas Jüstel , Prof. Vadim S. Gorshkov
, Prof. Frank T. Edelmann for the valuable inputs. I will go through the reading materials recommended. We are trying for Mossbauer measurement for clarity. I am yet to understand how I can understand the spin state from ESR. The shared articles may help. Thankyou once again.- Badges
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