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Magnetic polarons a...
Magnetic polarons and spin-glass behavior in insulating La1-xSrxCoO3 (x = 0.125 and 0.15)
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- Anil Kumar, Puri (author)
- Uppsala universitet,Fasta tillståndets fysik,Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India.
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- Nag, Abhishek (author)
- Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India.
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- Mathieu, Roland (author)
- Uppsala universitet,Fasta tillståndets fysik
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- Das, Ranjan (author)
- Indian Inst Sci, Solid State & Struct Chem Unit, Bengaluru 560012, India.
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- Ray, Sugata (author)
- Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India.
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- Nordblad, Per (author)
- Uppsala universitet,Fasta tillståndets fysik
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- Hossain, Akmal (author)
- Indian Inst Sci, Solid State & Struct Chem Unit, Bengaluru 560012, India.
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- Cherian, Dona (author)
- Indian Inst Sci, Solid State & Struct Chem Unit, Bengaluru 560012, India.
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- Venero, Diego Alba (author)
- ISIS Neutron & Muon Source, STFC Rutherford Appleton Lab, Didcot OX11 OQX, England.
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- DeBeer-Schmitt, Lisa (author)
- Oak Ridge Natl Lab, Large Scale Struct Grp, Neutron Sci Directorate, Oak Ridge, TN 37831 USA.
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- Karis, Olof (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Sarma, D. D. (author)
- Indian Inst Sci, Solid State & Struct Chem Unit, Bengaluru 560012, India.
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(creator_code:org_t)
- AMER PHYSICAL SOC, 2020
- 2020
- English.
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In: Physical Review Research. - : AMER PHYSICAL SOC. - 2643-1564. ; 2:4
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Abstract
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- The evolution of magnetic polarons in Sr doped LaCoO3 (La1-xSrxCoO3) single crystal and polycrystalline samples are investigated by employing dc and ac magnetic measurement and small angle neutron scattering (SANS) techniques. The effect of magnetic field and temperature on magnetic polarons is experimentally studied for La0.875Sr0.125CoO3 and La0.85Sr0.15CoO3 compounds that belong to the spin glass insulating regime of the broader compositional phase diagram of this system. Langevin analyses of the isothermal magnetization curves in the notional paramagnetic regime prove the existence of magnetic polarons with large moments. The dc field superimposed ac susceptibility data and the analysis of the glassy dynamics prove that the size of polarons in 15% Sr doped crystal increase as the field is increased while the field effect is not visible in the 12.5% Sr doped crystal. A polycrystalline sample of La0.85Sr0.15CoO3 is analyzed by SANS experiments, which confirm nonzero correlation length at temperatures far above the macroscopic ordering temperature and hence the presence of magnetic polarons.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Anil Kumar, Puri
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Nag, Abhishek
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Mathieu, Roland
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Das, Ranjan
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Ray, Sugata
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Nordblad, Per
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show more...
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Hossain, Akmal
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Cherian, Dona
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Venero, Diego Al ...
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DeBeer-Schmitt, ...
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Karis, Olof
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Sarma, D. D.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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Uppsala University