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Unusually large mag...
Unusually large magnetic moment and tricritical behavior of the CMR compound NaCr 2 O 4 revealed with high resolution neutron diffraction and μ + SR
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- Nocerino, E. (författare)
- Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology
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- Forslund, Ola Kenji, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Sakurai, Hiroya (författare)
- National Institute for Materials Science (NIMS)
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- Hoshikawa, Akinori (författare)
- Ibaraki University
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- Matsubara, Nami (författare)
- Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology
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- Andreica, Daniel (författare)
- Universitatea Babes-Bolyai,Babeș-Bolyai University
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- Zubayer, Anton (författare)
- Linköpings universitet,Linköping University
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- Mazza, F. (författare)
- Technische Universität Wien,Vienna University of Technology
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- Saito, Takashi (författare)
- High Energy Accelerator Research Organization (KEK)
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- Sugiyama, Jun (författare)
- Japan Atomic Energy Agency
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- Umegaki, I. (författare)
- High Energy Accelerator Research Organization (KEK)
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- Sassa, Yasmine, 1981 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Månsson, Martin (författare)
- Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology
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(creator_code:org_t)
- 2023
- 2023
- Engelska.
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Ingår i: JPhys Materials. - 2515-7639. ; 6:3
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The mixed valence Cr3+/Cr4+ compound NaCr2O4, hosts a plethora of unconventional electronic properties. In the present study, muon spin rotation/relaxation ( μ + SR) and high-resolution time-of-flight neutron powder diffraction measurements were carried out on high-quality samples to clarify the complex magnetic ground state of this unique material. We identified a commensurate canted antiferromagnetic order (C-AFM) with a canting angle of the Cr spin axial vector equal to θ c = ( 8.8 ± 0.5 ) ∘ , and an estimated Cr moment μ C r C ∼ ( 4.30 ± 0.01 ) μ B . Such an unusually large value of μ C r C is compatible with the existence of high-spin Cr sites created by the presence of an unconventional negative charge transfer state in NaCr2O4. In addition to the C-AFM structure, a novel magnetic supercell was also revealed. Such supercell display an incommensurate (IC)-AFM propagation vector (0 0 1 2 − δ ), having a Cr moment μ C r I C = ( 2.20 ± 0.03 ) μ B . It is suggested that the C-AFM and IC-AFM modulations have two different electronic origins, being due to itinerant and localized contributions to the magnetic moment respectively. Finally, the direct measurement of the magnetic order parameter for the C-AFM structure provided a value of the critical exponent β = 0.245 ≈ 1 4 , suggesting a non conventional critical behavior for the magnetic phase transition in NaCr2O4
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- neutron diffraction
- unconventional magnetism
- muon spin rotation
- colossal magnetoresistance
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Nocerino, E.
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Forslund, Ola Ke ...
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Sakurai, Hiroya
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Hoshikawa, Akino ...
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Matsubara, Nami
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Andreica, Daniel
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visa fler...
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Zubayer, Anton
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Mazza, F.
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Saito, Takashi
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Sugiyama, Jun
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Umegaki, I.
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Sassa, Yasmine, ...
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Månsson, Martin
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visa färre...
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