2000
DOI: 10.1103/physrevb.61.9028
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Structural and magnetic properties ofLa0.7Pb0.3(Mn

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Cited by 98 publications
(46 citation statements)
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“…Further experiments are necessary to fully understand how Fe doping affects the magnetic state of these samples but strong indication of AFM and FM competing interaction is expected from our observations for x = 0.15 sample. Indeed local AFM superexchange interactions between Fe and Mn ions are expected in our system as no competing DE (FM) interactions are possible [19][20][21]. This point is confirmed by our M s meas value for x=0.05 lower than the one for x=0 whereas a larger value would be expected for a FM full spin alignment (Fe 3+ contributes with 5μB whereas Mn 3+ contributes with 4μB [17,18] system.…”
Section: Emm-fm2011supporting
confidence: 64%
“…Further experiments are necessary to fully understand how Fe doping affects the magnetic state of these samples but strong indication of AFM and FM competing interaction is expected from our observations for x = 0.15 sample. Indeed local AFM superexchange interactions between Fe and Mn ions are expected in our system as no competing DE (FM) interactions are possible [19][20][21]. This point is confirmed by our M s meas value for x=0.05 lower than the one for x=0 whereas a larger value would be expected for a FM full spin alignment (Fe 3+ contributes with 5μB whereas Mn 3+ contributes with 4μB [17,18] system.…”
Section: Emm-fm2011supporting
confidence: 64%
“…The effect of the addition of Fe is mostly felt by the packing densities, which decrease from = 0.49 for the parent compound to a loosely packed structure with = 0.32, an effect which is accompanied by a strong enhancement of the CMR effect. 27 In contrast, the crystal lattices expand uniformly up to about 0.5% with the introduction of up to x = 0.2 of Fe, leaving the relevant angles unchanged. In real numbers, the Q3 orthorhombic distortion varies from 0.288 for the parent compound to a mere 0.292 for x = 0.2…”
Section: Methodsmentioning
confidence: 99%
“…The samples were synthesized by the sol-gel method, 27 which yields finely divided powders with compositions La 0.7 Pb 0.3 ͑Mn 1−x Fe x ͒O 3 , 0ഛ x ഛ 0.2. The averaged grain sizes as determined by transmission electron microscopy came to be of about 100 nm for the Fe undoped composition, and ranging from 80 to 50 nm as the Fe content is increased.…”
Section: Methodsmentioning
confidence: 99%
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