Low-field magnetic properties of LaMnO3+δ with 0.065≤δ≤0.154

Laiho, R.; Лисунов, K. Г.; Lähderanta, E.; Petrenko, P. A.; Salminen, JP; Stamov, V N; Stepanov, Yu. P.; Захвалинский, В. С.

doi:10.1016/s0022-3697(03)00266-x

Cited by 45 publications

(38 citation statements)

References 26 publications

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“…The fit of T C (inf) (y), given by the solid line in the inset to Fig. 2, yields the values of W¼2.670.1 eV and c 0 ¼0.3170.01, showing that c 0 can differ from x¼0.30 only by $ 3À 6%, which are typical values of the relative hole concentration due to the cation vacancies in manganites [30]. On the other hand, W, obtained above, coincides within the error with the value of WE2.5 eV given for LSMO [29].…”

Section: Ferromagnetic Transition In Lsmfomentioning

confidence: 87%

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Phase separation, ferromagnetism and magnetic irreversibility in La1−xSrxMn1−yFeyO3

Захвалинский

Laiho

Lashkul

et al. 2011

Journal of Magnetism and Magnetic Materials

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Section: Ferromagnetic Transition In Lsmfomentioning

confidence: 87%

“…in LSMO [29], La 1À x Ca x MnO 3 [25], LaMnO 3 þ d [30], La 1À x Ba x MnO 3 [26] and LaMn 1À x Ni x O 3 [31]. In low fields minimizing the effect of the phase separation, T C is given by the expression…”

Section: Ferromagnetic Transition In Lsmfomentioning

confidence: 99%

Phase separation, ferromagnetism and magnetic irreversibility in La1−xSrxMn1−yFeyO3

Захвалинский

Laiho

Lashkul

et al. 2011

Journal of Magnetism and Magnetic Materials

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“…These results are in agreement with the XRD discussed earlier. The deviation from oxygen stoichiometry, δ, as per the chemical formula La 0:8 Sr 0:2 MnO 3AEd , determined following iodine titration method [52], is given in Table 3. A close look at Table 3 suggests that with the reduction in crystallite size, δ increases, which implies increased Mn 4+ concentration.…”

Section: X-ray Powder Diffractionmentioning

confidence: 99%

Study of mechanochemically prepared nanocrystalline La0.8Sr0.2MnO3

Nagde

Bhoga

2009

Ionics

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The nanocrystalline La 0.8 Sr 0.2 MnO 3 (LSM) is prepared by varying the revolutions per minute and milling time of planetary monomill during the mechanochemical method. The LSM forms in a relatively shorter milling time with an increase in the milling speed from 250 to 600 rpm. The structural phase transition from orthorhombic to rhombohedral phase in the LSM prepared by ball milling at the speed 250 rpm for 36 h is seen due to sintering it at 700°C for 4 h. The crystallite size reduces with the increase in both the milling speed and the milling time individually or combined. The microhardness (HV) and sintered density increase with the reduction in the crystallite size. The temperature-activated transition temperature is suppressed by reducing the grain size in the nanometer range. The electrical dc conductivity increases with the reduction in the grain/crystallite size.

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“…Oxides in which the A site (i.e., La) has been substituted with other cations like Ca or Pb are also found to show ferromagnetism and magnetoresistance. For example, oxides like La 0:7 Ca 0:3 MnO 3 [15], show electron spin ordering along with magnetoresistance. The parent compound LaMnO 3 is antiferromagnetic, but substitution with other metal ions, e.g., Sr allows hopping of e g electrons belonging to Mn +3 to the neighboring sites containing Mn +4 ions.…”

Section: Introductionmentioning

confidence: 99%