Magnetic properties of (La0.8Ba0.2)0.93MnO3 single crystal

Bukhantsev, Yu.; Mukovskiǐ, Ya. M.; Szmczak, H.

doi:10.1016/j.jmmm.2003.12.1161

Cited by 7 publications

(1 citation statement)

References 9 publications

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“…Note that the value of K is two order higher than bulk FM manganites. [16,17] The large anisotropy is ascribed to the induced exchange anisotropy at the FM/glassy magnetic interface, where exchange anisotropy is strongly dependent on the area of the interface. Here, we propose that the FM clusters are embedded in the glassy magnetic host in order to satisfy the large interface.…”

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Exchange bias with Fe substitution in LaMnO3

Patra

Majumdar

et al. 2007

Eur. Phys. J. B

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The exchange bias (EB) in LaMn0.7Fe0.3O3 is observed by the negative shift and training effect of the hysteresis loops, while the sample was cooled in external magnetic field. The analysis of cooling field dependence of EB gives the size of the ferromagnetic (FM) cluster ≈ 25 Å, where the magnetic anisotropy of FM cluster is found two order of magnitude higher than the FM bulk manganites. We propose that the nanoscale FM clusters are embedded in the glassy magnetic host with EB at the FM/glassy magnetic interface.Introduction. -Recently, the observation of exchange bias (EB) in the phase separated (PS) charge ordered (CO) manganites opens up a new prospective of technological applications in addition to the colossal magnetoresistance (CMR) properties. [1, 2] Exchange bias is a novel phenomenon, which is ascribed to the induced exchange anisotropy at the interface between ferromagnetic (FM) and antiferromagnetic (AFM) phases in a heterogeneous system. [3,4] The induced exchange anisotropy is unidirectional in character and increases the effective anisotropy of the heterogeneous system, which has the technological applications for storage and spin-electron devices. The evidence of EB was first discovered by Meiklejohn and Bean in 1956 for FM Co core and AFM CoO shell structure, [5] which has also been observed at the FM/spin-glass (SG) interface. [6][7][8][9] In addition to the technological importance, the evidence of EB further provides the microscopic views of the inhomogeneous phase separation in manganites. The first evidence of EB was observed in CO manganite Pr 1/3 Ca 2/3 MnO 3 , where ferromagnetic (FM) droplets are naturally embedded in the AFM background. [1] The other example of EB have recently been reported for CO manganite, where the strong cooling field dependence of EB is ascribed to the thickness of the FM layer in a spontaneous lamellar ferromagnetic/antiferromagnetic phase separated Y 0.2 Ca 0.8 MnO 3 . [2] In this letter, we also report the EB for 30 % Fe substitution in LaMnO 3 at the FM/glassy magnetic interface. Notably, we observe the EB at the FM/glassy magnetic interface in contrast to the phenomanon at the FM/AFM interface for CO manganites. The EB was characterised by the unidirectional shift of the magnetic hysteresis loops under different field-cooled conditions, which was further confirmed by the training effect.Experimental procedure. -The polycrystalline sample of LaMn 0.7 Fe 0.3 O 3 was prepared by a chemical route. [10] The single rhombohedral phase (R3c) of the compound

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confidence: 99%

Exchange bias with Fe substitution in LaMnO3

Patra

Majumdar

et al. 2007

Eur. Phys. J. B

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Magnetostriction of Manganites and Cobaltites

Szymczak

Smart Materials for Ranging Systems

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Magnetodielectric effect in BaTiO3−LaMnO3 composites

Kim

Koo

Won

et al. 2007

Journal of Applied Physics

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The structural, dielectric, magnetic, and magnetodielectric properties were systematically investigated for (1−x)BaTiO3−(x)LaMnO3 composites in wide temperatures, frequencies, and mole percent (x). Dielectric anomaly around 410 K and magnetic hysteresis at 293 K were clearly observed, which might imply the coexistence of ferroelectricity and ferromagnetism at room temperature. The values of magnetodielectric effect were well scaled with M2, i.e., ([ε(H)−ε(0)]/ε(0))∼M2, and were increased with x. The observed magnetodielectric effect were discussed in conjunction with the formation of a magnetoresistive (La,Ba)MnO3 phase.

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Magnetic properties of (La0.8Ba0.2)0.93MnO3 single crystal

Cited by 7 publications

References 9 publications

Exchange bias with Fe substitution in LaMnO3

Exchange bias with Fe substitution in LaMnO3

Magnetostriction of Manganites and Cobaltites

Magnetodielectric effect in BaTiO3−LaMnO3 composites

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