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Memory and superpos...
Memory and superposition in a superspin glass
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- Peddis, D. (författare)
- CNR, Ist Struttura Mat, I-00015 Monterotondo, RM, Italy.;Le Mans Univ, Inst Mol & Mat Mans, CNRS, UMR 6283, F-72085 Le Mans 9, France.;Univ Genoa, Dipartimento Chim & Chim Ind, Via Dodecaneso 31, I-16146 Genoa, Italy.
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- Trohidou, K. N. (författare)
- NCSR Demokritos, Inst Nanosci & Nanotechnol, Athens 15310, Greece.
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- Vasilakaki, M. (författare)
- NCSR Demokritos, Inst Nanosci & Nanotechnol, Athens 15310, Greece.
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- Margaris, G. (författare)
- NCSR Demokritos, Inst Nanosci & Nanotechnol, Athens 15310, Greece.
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- Bellusci, M. (författare)
- ENEA, Dept Mat & Proc, I-00123 Rome, Cr Casaccia, Italy.
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- Varsano, F. (författare)
- ENEA, Dept Mat & Proc, I-00123 Rome, Cr Casaccia, Italy.
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- Hudl, Matthias (författare)
- Stockholms universitet,Fysikum,Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden.
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- Yaacoub, N. (författare)
- Le Mans Univ, Inst Mol & Mat Mans, CNRS, UMR 6283, F-72085 Le Mans 9, France.
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- Fiorani, D. (författare)
- CNR, Ist Struttura Mat, I-00015 Monterotondo, RM, Italy.
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- Nordblad, Per (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Mathieu, Roland (författare)
- Uppsala universitet,Fasta tillståndets fysik
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CNR, Ist Struttura Mat, I-00015 Monterotondo, RM, Italy;Le Mans Univ, Inst Mol & Mat Mans, CNRS, UMR 6283, F-72085 Le Mans 9, France.;Univ Genoa, Dipartimento Chim & Chim Ind, Via Dodecaneso 31, I-16146 Genoa, Italy. NCSR Demokritos, Inst Nanosci & Nanotechnol, Athens 15310, Greece. (creator_code:org_t)
- 2021-04-08
- 2021
- Engelska.
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 11:1
- Relaterad länk:
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https://doi.org/10.1...
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https://www.nature.c...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The non-equilibrium dynamics of the superspin glass state of a dense assembly of similar to 2 nm MnFe2O4 nanoparticles was investigated by means of magnetization, ac susceptibility and Mossbauer spectroscopy measurements and compared to the results of Monte Carlo simulations for a mesoscopic model that includes particles morphology and interparticle interactions. The zero-field cooled (ZFC), thermoremanent (TRM), and isothermal remanent magnetization (IRM) were recorded after specific cooling protocols and compared to those of archetypal spin glasses and their dimensionality. The system is found to display glassy magnetic features. We illustrate in detail, by a number of experiments, the dynamical properties of the low-temperature superspin glass phase. We observe that these glassy features are quite similar to those of atomic spin glasses. Some differences are observed, and interestingly, the non-atomic nature of the superspin glass is also reflected by an observed superspin dimensionality crossover. Monte Carlo simulations-that explicitly take into account core and surface contributions to the magnetic properties of these ultrasmall nanoparticles in direct contact, as well as interparticle interactions-evidence effects of the interplay between (intraparticle) core/surface exchange coupling and (interparticle) dipolar and exchange interactions.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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Till lärosätets databas
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Peddis, D.
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Trohidou, K. N.
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Vasilakaki, M.
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Margaris, G.
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Bellusci, M.
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Varsano, F.
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visa fler...
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Hudl, Matthias
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Yaacoub, N.
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Fiorani, D.
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Nordblad, Per
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Mathieu, Roland
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Den kondenserade ...
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- Av lärosätet
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Stockholms universitet
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Uppsala universitet