Effect of Co substitution on magnetic ground state in Sm0.5Ca0.5MnO3

Xu, Xiaolong; Li, Y.; Hou, Feifei; Cheng, Qian; Su, Runzhou

doi:10.1016/j.jallcom.2014.12.116

Cited by 10 publications

(1 citation statement)

References 26 publications

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“…For instance, the charge ordering temperature (TCO) for Nd0.75Na0.25MnO3 and Pr0.75Na0.25MnO3 are recorded approximately at 170 K and 220 K respectively [14,15]. On the other hand, small substitution of magnetic Co 3+ at the Mn site of the manganese compound is believed to alter the properties due to the modification of Mn 3+ -O 2-Mn 4+ network [16][17][18]. It is well known that cobalt shoes different spin states resulting from the competition between values of crystal field splitting and Hund's coupling energy; low spin states ( e S = 2 for Co 3+ ) [19].…”

Section: Introductionmentioning

confidence: 99%

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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