Spin-phonon coupling in PrMn2O5 nanorods

Ting Wei Hsu, Chung Cheun Yang, Huo Yen Chen, Hsi Sheng Hsia, Kuen Song Lin

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PrMn2O5 nanorods with five axial (LC) × radial lengths of 63 nm × 25 nm, 150 nm × 25 nm, 152 nm × 29 nm, 259 nm × 86 nm, and 262 nm × 87 nm were fabricated by the hydrothermal method. Experiments on magnetic susceptibility demonstrate incommensurate antiferromagnetic (ICAFM) (TN) and ICAFM-to-commensurate antiferromagnetic (TN′) ordering at 43 and 20 K, respectively, in the samples with LC ≤ 259 nm. At LC = 262 nm, both TN and TN are shifted to higher temperatures and the samples exhibit magnetic correlation from 150 K. Experimentally obtained M-H curves demonstrate that only the sample with LC = 262 nm exhibits a hysteresis loop. Raman spectra obtained at various temperatures reveal that in only the sample with LC = 262 nm does the Ag + B1g mode exhibit a large Raman shift until the sample is cooled to 150 K. The distinctiveness of the LC = 262 nm sample arises from annealing. This treatment reduces the barrier to magnetic ordering that is caused by defects and promotes spin-phonon coupling at high temperatures.

Original languageEnglish
Article number6971797
JournalIEEE Transactions on Magnetics
Issue number11
StatePublished - 1 Nov 2014


  • Magnetic
  • multiferroic
  • nanorod
  • size effect
  • spin-phonon


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