Effect of Size Reduction on Magnetic Ordering in Sm1-x Ca (x) MnO3 (x=0.35, 0.65 and 0.92) Manganites: Magnetic and EMR Studies


Autoria(s): Goveas, Lora Rita; Bhagyashree, KS; Anuradha, KN; Bhat, SV
Data(s)

2015

Resumo

We have employed the highly sensitive electron magnetic resonance technique complimented by magnetization measurements to study the impact of size reduction on the magnetic ordering in nanosized Sm1-x Ca (x) MnO3 (x = 0.35, 0.65 and 0.92). In the bulk form, x = 0.35 sample shows a charge ordering transition at 235 K followed by a mixed magnetic phase, the sample with x = 0.65 exhibits charge order below 275 K and shows an antiferromagnetic insulator phase below 135 K while that with x = 0.92 has a ferromagnetic-cluster glass ground state. Thus, a comparative study of magnetic ground states of bulk and nanoparticles (diameter similar to 25 nm) enables us to investigate size-induced effects on different types of magnetic ordering. It is seen that in the bulk samples the temperature dependences of the EPR parameters are quite different from each other. This difference diminishes for the nanosamples where all the three samples show qualitatively similar behavior. The magnetization measurements corroborate this conclusion.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/52433/1/App_Mag_Res_46-9_967_2015.pdf

Goveas, Lora Rita and Bhagyashree, KS and Anuradha, KN and Bhat, SV (2015) Effect of Size Reduction on Magnetic Ordering in Sm1-x Ca (x) MnO3 (x=0.35, 0.65 and 0.92) Manganites: Magnetic and EMR Studies. In: APPLIED MAGNETIC RESONANCE, 46 (9). pp. 967-976.

Publicador

SPRINGER WIEN

Relação

http://dx.doi.org/10.1007/s00723-015-0647-6

http://eprints.iisc.ernet.in/52433/

Palavras-Chave #Physics
Tipo

Journal Article

PeerReviewed