Exploration of structural and magnetic properties of bulk and nano sized Pr0.57Ca0.43Mn1-YGaYO3 (Y=0, 0.02) manganite synthesised by sol-gel method

被引：7
作者：
Koushalya, P. R. [1 ,2 ]
Manjunatha, A. S. [2 ,3 ]
机构：
[1] Don Bosco Inst Technol, Dept Phys, Mysore Rd, Kumbalagodu 560074, Bengaluru, India
[2] Visvesvaraya Technol Univ Belagavi, Belagavi, India
[3] Don Bosco Inst Technol, Dept Chem, Mysore Rd, Kumbalagodu 560074, Bengaluru, India
来源：
APPLIED SURFACE SCIENCE ADVANCES | 2021年 / 6卷
关键词：
Perovskite; Charge order; Ferromagnetism; Antiferromagnetic phase; Sol gel synthesis superparamagnetism; Blocking temperature; TRANSPORT-PROPERTIES; CHARGE; MAGNETORESISTANCE; SUBSTITUTION; PR1-XCAXMNO3; PEROVSKITES; FIELD; CO;
D O I：
10.1016/j.apsadv.2021.100135
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Pr0.57Ca0.43MnO3 (PCMO) & Pr0.57Ca0.43Mn0.98Ga0.02O3 (PCMGO) manganites are synthesized by sol gel technique. Structural characterization was done through XRD, SEM, TEM, FTIR and EDAX analysis. Magnetization measurements were carried out through Vibration Sample Magnetometer (VSM). Field cooled (FC) and Zero field cooled (ZFC) magnetization of both the nano particles with respect to temperature were studied and compared. Pr0.57Ca0.43MnO3(PCMOB) bulk sample is charge ordered(CO) at temperature 240K and shows antiferromagnetic (AFM) ordering peak at temperature T-N=170K. We recorded the Ferromagnetic (FM) transition in 2% Ga doped Pr0.57Ca0.43Mn0.98Ga0.02O3 (PCMGOB) bulk sample but CO peak remains unaltered. Interestingly disappearance of CO and emergence of FM phase is found in both PCMO and PCMGO nano particles. FM transition is further confirmed by magnetization hysteresis studies. Both the nano particles exhibit Superparamagnetic behavior with blocking temperature at T-B=35 K. The possible reasons for the observed results are discussed.
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页数：9
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