Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session W08: Quantum Phase Transition and Critical Matter
3:00 PM–5:48 PM,
Thursday, March 7, 2024
Room: L100I
Sponsoring
Unit:
DCMP
Chair: Adarsh Patri, Massachusetts Institute of Technology
Abstract: W08.00013 : Atomic Disorder Study in Ni alloys close to the Ferromagnetic Quantum Critical Point*
5:24 PM–5:36 PM
Presenter:
Hind Adawi
(Jazan University)
Authors:
Hind Adawi
(Jazan University)
Arwa Alyami
(Department of Physics, Kent State University)
Adane Gebretsadik
(Kent state university)
Ruizhe Wang
(Kent State University)
Jean-Guy Lussier
(Kent state university)
Almut Schroeder
(Kent State University)
Katharine Page
(The University of Tennessee)
Collaborations:
Hind Adawi, Arwa Alyami, Adane Gebretsadik, Ruizhe Wang, Jean-Guy Lussier, and Katharine Page, Almut Schroeder
We present here a wide-angle neutron diffraction data and pair distribution function (PDF) analysis of both ferromagnetic Ni-alloys to check for the actual atomic distributions in polycrystalline samples prepared under different growth and annealing protocols.
Our PDF study uncovers that the atoms in Ni-V [3] and Ni-Cr are most likely randomly distributed on the lattice sites of the face-centered cubic (fcc) crystal structure for x<0.15. That confirms the ideal condition for a random distribution of “magnetic” clusters.
PDF data distinguish well simple random atom model from cluster and structure models. The results are sensitive to variation in the sample preparation and treatment. Only high temperature annealed samples yield the solid solution. Deviation from the protocol might lead to local inhomogeneities even to phase separation in Ni-Cr and Ni-V as demonstrated.
[1] R. Wang, A. Gebretsadik et al, “Quantum Griffiths phase inside the ferromagnetic phase in Ni1-xVx”, Phys Rev Lett 118, 267202 (2017)
[2] S. Bhattarai, H Adawi et al, “Evolution of short-range magnetic correlations in ferromagnetic Ni-V alloys”, Phys. Rev. B 107, 054409 (2023)
[3] A. Gebretsadik, et al, “Study of Atomic Disorder in Ni-V alloys”, arXiv:2302.1986, submitted to PRB
*The NPDF instrument at the Los Alamos Neutron Science Center, Los Alamos National Laboratory.The NOMAD instrument at the Spallation Neutron Source, a US Department of Energy Office of Science User Facility operated by Oak Ridge National Laboratory.HA acknowleges the supports Jazan University.
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