Size effect on multiferroic HoMn2O5 nanorods

Chun Chuen Yang, Ting Wei Hsu, Sheng Shiang You, Jaw Jih Ding, Wei Jhe Shih, Yang Yuan Chen, Maw Kuen Wu

Research output: Contribution to journalArticlepeer-review


The effects of size on the magnetic properties of HoMn2O5 nanorods were studied. Nanorods were made with five radial (〈LC〉) × axial lengths-24(7) nm × 49(19) nm, 33(14) nm × 66(25) nm, 31(9) nm × 69(25) nm, 54(13) nm × 95(27) nm, and 114(52) nm × 409(109) nm. The axial directions of the nanorod were parallel to the c-axis of the crystals. All samples crystallized with orthorhombic Pbam symmetry with no phase change between 15 and 300 K. Upon cooling, only the sample with 〈LC〉 = 409 nm exhibited incommensurate and incommensurate-to-commensurate antiferromagnetic transitions at 43 and 38 K, respectively. No sample yielded an obvious hysteresis loop at 2 K. Measurements of magnetic susceptibility reveal that the critical range of sizes for magnetic ordering in HoMn2O5 is between 〈LC〉 = 95 and 409 nm.

Original languageEnglish
Article number6971597
JournalIEEE Transactions on Magnetics
Issue number11
StatePublished - 1 Nov 2014


  • Magnetic
  • multiferroic
  • nanorod
  • size effect


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