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Observation of coherently coupled cation spin dynamics in an insulating ferrimagnetic oxide

Klewe, C. (author)
Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
Shafer, P. (author)
Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
Shoup, J. E. (author)
Univ S Florida, Dept Phys, Tampa, FL 33620 USA.
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Kons, C. (author)
Univ S Florida, Dept Phys, Tampa, FL 33620 USA.
Pogoryelov, Yevgen (author)
Uppsala universitet,Energimaterialens fysik
Knut, Ronny (author)
Uppsala universitet,Energimaterialens fysik
Gray, B. A. (author)
US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Jeon, H.-M. (author)
KBR, Beavercreek, OH 45431 USA.
Howe, B. M. (author)
US Air Force, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Karis, Olof (author)
Uppsala universitet,Energimaterialens fysik
Suzuki, Y. (author)
Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA.;Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA.
Arenholz, E. (author)
Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
Arena, D. A. (author)
Univ S Florida, Dept Phys, Tampa, FL 33620 USA.
Emori, S. (author)
Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA.;Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA.
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Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA Univ S Florida, Dept Phys, Tampa, FL 33620 USA. (creator_code:org_t)
American Institute of Physics (AIP), 2023
2023
English.
In: Applied Physics Letters. - : American Institute of Physics (AIP). - 0003-6951 .- 1077-3118. ; 122:13
Related links:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Many technologically useful magnetic oxides are ferrimagnetic insulators, which consist of chemically distinct cations. Here, we examine the spin dynamics of different magnetic cations in ferrimagnetic NiZnAl-ferrite (Ni0.65Zn0.35Al0.8Fe1.2O4) under continuous microwave excitation. Specifically, we employ time-resolved x-ray ferromagnetic resonance to separately probe Fe2+/3+ and Ni2+ cations on different sublattice sites. Our results show that the precessing cation moments retain a rigid, collinear configuration to within ≈2°. Moreover, the effective spin relaxation is identical to within <10% for all magnetic cations in the ferrite. Thus, we validate the oft-assumed “ferromagnetic-like” dynamics in the resonantly driven ferrimagnetic oxide: the magnetic moments from different cations precess as a coherent, collective magnetization, despite the high contents of nonmagnetic Zn2+ and Al3+ diluting the exchange interactions.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

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