Neutron Diffraction of Magnetic Materials

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Neutron Diffraction of Magnetic Materials | Izyumov | Springer

From the determined energy-level diagrams and the relative INS intensities we can show that the inclusion of a rhombic term in the zero-field splitting ZFS Hamiltonian is essential in these compounds. The wave functions derived from the energy analysis are in excellent agreement with the relative intensities of the observed INS transitions. Direct information about the rate of quantum tunneling is contained in the cluster wave functions derived in this study.

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Article Views Altmetric -. Citations Cited By. This article is cited by 96 publications. Stavretis, Seth C. Inorganic Chemistry , 55 24 , DOI: Shelby E. Stavretis, Mihail Atanasov, Andrey A. Podlesnyak, Seth C. Inorganic Chemistry , 54 20 , Inorganic Chemistry , 53 17 , Seth C. Hunter, Andrey A. Podlesnyak, and Zi-Ling Xue. Inorganic Chemistry , 53 4 , The Journal of Physical Chemistry A , 40 , The Journal of Physical Chemistry C , 13 , Reu, A.

Palii, S. Ostrovsky, P. Tregenna-Piggott, and S. Inorganic Chemistry , 51 20 , Sophia I. Klokishner, Serghei M. Ostrovsky, Oleg S. Reu and Andrei V. Palii, Philip L. The Journal of Physical Chemistry C , 20 , Graf, Jose R. Journal of the American Chemical Society , 12 , Philip L. Klokishner, Sergei M. Ostrovsky, Andrei V.

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Palii, Oleg S. Inorganic Chemistry , 48 1 , Liviu F. Journal of the American Chemical Society , 37 , Abhudaya Mishra, Anastasios J. Tasiopoulos, Wolfgang Wernsdorfer, Eleni E. Moushi, Brian Moulton, Michael J. Zaworotko, Khalil A. Abboud and George Christou. Inorganic Chemistry , 47 11 , Yachandra, Wolfgang Wernsdorfer, Khalil A.

Inorganic Chemistry , 47 6 , Constantinos J. Perlepes,, George Christou, and, Euan K. Journal of the American Chemical Society , 41 , Theocharis C. Stoumpos,, Catherine P. Hill,, Spyros P. Perlepes, and, George Christou. Journal of the American Chemical Society , 30 , Inorganic Chemistry , 46 16 , Journal of the American Chemical Society , 29 , Journal of the American Chemical Society , 24 , Inorganic Chemistry , 45 9 , Inorganic Chemistry , 45 3 , Inorganic Chemistry , 44 19 , Inorganic Chemistry , 44 12 , Inorganic Chemistry , 44 3 , Andrei V.

Palii,, Sergei M. Ostrovsky,, Sophia I. Klokishner,, Boris S. Tsukerblat,, Curtis P. Berlinguette,, Kim R. Journal of the American Chemical Society , 51 , Inorganic Chemistry , 43 18 , The Journal of Physical Chemistry B , 31 , Journal of the American Chemical Society , 28 , An element like Vanadium is a strong scatterer of X-rays, but its nuclei hardly scatter neutrons, which is why it often used as a container material.

Non-magnetic neutron diffraction is directly sensitive to the positions of the nuclei of the atoms. A major difference with X-rays is that the scattering is mostly due to the tiny nuclei of the atoms.

Volume 63: Neutron Scattering in Earth Sciences

That means that there is no need for an atomic form factor to describe the shape of the electron cloud of the atom and the scattering power of an atom does not fall off with the scattering angle as it does for X-rays. Diffractograms therefore can show strong well defined diffraction peaks even at high angles, particularly if the experiment is done at low temperatures.

Many neutron sources are equipped with liquid helium cooling systems that allow to collect data at temperatures down to 4. The superb high angle i. On the other hand, Fourier maps and to a lesser extent difference Fourier maps derived from neutron data suffer from series termination errors, sometimes so much that the results are meaningless.

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Although neutrons are uncharged, they carry a spin, and therefore interact with magnetic moments, including those arising from the electron cloud around an atom. Neutron diffraction can therefore reveal the microscopic magnetic structure of a material. Magnetic scattering does require an atomic form factor as it is caused by the much larger electron cloud around the tiny nucleus. The intensity of the magnetic contribution to the diffraction peaks will therefore dwindle towards higher angles. Neutron diffraction.

Neutron diffraction Yes Page Image. Image Caption. Why use neutrons?

Neutrons scatter from materials by interacting with the nucleus of an atom rather than the electron cloud. This fact confers specific properties that make of neutron beams an extremely versatile and unique analytical probe. Electrically Neutral. Neutrons are non-destructive and can penetrate deep into matter. This makes them an ideal probe for biological materials and samples under extreme conditions of pressure, temperature, magnetic field or within chemical reaction vessels. Microscopically Magnetic. They possess a magnetic dipole moment which makes them sensitive to magnetic fields generated by unpaired electrons in materials.

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In addition, the scattering power of a neutron off an atomic nucleus depends on the orientation of the neutron and the spin of the atomic nuclei in a sample.