Ultrasonic Anomaly Near the Charge Ordering Transition in Sr-Doped Nd0.3La0.2Ca0.5−x Sr x MnO3 Manganites

Shamsuddin, Sarah Addyani; Supardan, Siti Nurbaya; Ibrahim, Abdel Baset Mohamed El Nabwi Abdel Hamid; Yahya, A. K.

doi:10.1007/s10948-013-2389-8

Cited by 3 publications

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“…Two distinct peaks were observed clearly at temperature around 200 K and 235 K for y = 0.02 and y = 0.05 samples respectively from the analysis of dln/dT -1 vs T curve (Inset Figure 4). Such observation can be suggested due to the existing of CO state as the peaks located in the of the charge ordering transition temperature [29]. Figure 5 illustrates the effects of the Co substitution on the temperature dependence of AC susceptibility for Pr0.75Na0.25Mn1-xCo-xO3 (0≤x≤0.05) samples within the temperature range of 50 K -300 K. The unsubstituted (x = 0) sample exhibits paramagnetic behavior at high temperature and followed by antiferromagnetic transition defined by a declined in χ around TN ~ 134K.…”

Section: Structural Analysismentioning

confidence: 95%

Effect Of Co3+ Substitution on Electro-Magnetic Properties of Pr¬0.75¬Na¬0.25¬mno¬3 ¬and Nd¬0.75¬Na¬0.25¬mno¬3¬ Manganites

Mannan¹,

Razali²,

Shamsuddin³

et al. 2018

IJET

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This paper reports influences of cobalt (Co) substituted at Mn-site of Pr0.75Na0.25Mn1-xCoxO3 and Nd0.75Na0.25Mn1-yCoyO3 on structure, electrical transport and magnetic properties. All of the samples were prepared via standard solid state reaction method. X-ray diffraction measurement indicates that all samples were crystallized in an orthorhombic structure (space group Pnma). Resistivity measurement displays the x = 0 sample manifests an insulator behavior while metal-insulator transition was found at 108 K and 84 K for x = 0.02 and 0.05 respectively for Pr0.75Na0.25Mn1-xCoxO3. On the other hand, all of the samples for Nd0.75Na0.25Mn1-yCoyO3 showed insulator behavior down to low temperature and analysis of the resistivity change with respect to temperature, dlnρ/dT-1 versus T reveals a slope changes of resistivity have been recorded. Two obvious peaks were recorded from the analysis for y = 0.02 and 0.05 which can be suggested to the existence of charge order transition at the vicinity. For magnetic properties, x = 0 sample showed a paramagnetic-antiferromagnetic transition and further substitution of Co, x = 0.02 and 0.05, induce the paramagnetic-ferromagnetic transition and antiferromagnetic arrangement respectively. Meanwhile, further substitution of Co, y = 0.02 and 0.05 indicate antiferromagnetic transition with increasing TN as Co increased.

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Section: Structural Analysismentioning

confidence: 95%