Metamagnetic transition of martensitic type in electron-doped manganites Ca1−xCexMnO3 (x=0.10, 0.12)

► Ca1−xLnxMnO3 (Ln – rare-earth ions) manganites display large-scale phase separation. ► We studied Ca1−xCexMnO3 (x=0.10, 0.12) in high magnetic fields up to 60T. ► Metamagnetic transitions and giant magnetoresistance are observed in Ca1−xCexMnO3. Magnetic and electrical properties of electron-doped...

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Bibliographic Details
Published in:Journal of alloys and compounds 2013-03, Vol.553, p.199-203
Main Authors: Loshkareva, N.N., Gorbunov, D.I., Andreev, A.V., Mushnikov, N.V., Skourski, Y., Wolff-Fabris, F.
Format: Article
Language:English
Subjects:
Alloys
Charge (electric)
Crystal growth
Electric charge
Electrical properties
Electrical resistivity
High magnetic fields
Magnetic fields
Magnetization
Magnetoresistance
Manganites
Melting
Oxide materials
Phase diagrams
Phase transitions
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Summary:► Ca1−xLnxMnO3 (Ln – rare-earth ions) manganites display large-scale phase separation. ► We studied Ca1−xCexMnO3 (x=0.10, 0.12) in high magnetic fields up to 60T. ► Metamagnetic transitions and giant magnetoresistance are observed in Ca1−xCexMnO3. Magnetic and electrical properties of electron-doped manganites Ca0.88Ce0.12MnO3 and Ca0.90Ce0.10MnO3 were studied in pulsed magnetic fields up to 60T in the temperature range T=1.5–260K. Metamagnetic transition caused by the melting of the charge/orbital ordering and martensitic structural transition in a magnetic field was revealed. The transition is accompanied by a change in electrical resistivity of the sample by three orders. A magnetic phase diagram in the plane of the H–T was constructed. Higher values of the critical transition fields for the system Ca1−xCexMnO3, compared to the known system Ca1−xSmxMnO3 are explained by a narrower range of phase separation and a bigger difference between the Néel temperatures of the C and G-type antiferromagnetic phases, which originated from the difference between the valence of the Ce4+ and Sm3+ ions.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2012.11.119