Institute of Electrical and Electronics Engineers Inc.;New York: IEEE
摘要:
摘要： PrMn 2 O 5 nanorods with five axial ((L C )) x radial lengths of 63 nm x 25 nm, 150 nm x 25 nm, 152 nm x 29 nm, 259 nm x 86 nm, and 262 nm x 87 nm were fabricated by the hydrothermal method. Experiments on magnetic susceptibility demonstrate incommensurate antiferromagnetic (ICAFM) (T N ) and ICAFM-to-commensurate antiferromagnetic (T N ,) ordering at 43 and 20 K, respectively, in the samples with (L C ) ≤ 259 nm. At (L C ) = 262 nm, both T N and T N , 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 (L C ) = 262 nm exhibits a hysteresis loop. Raman spectra obtained at various temperatures reveal that in only the sample with (L C ) = 262 nm does the A g + B 1g mode exhibit a large Raman shift until the sample is cooled to 150 K. The distinctiveness of the (L C ) = 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. 其他題名： TMAG 出版者： New York: IEEE 出版日期： 2014-11 出處： IEEE transactions on magnetics, 2014-11, Vol.50 (11), p.1-4 資源來源： IEEE Xplore (NTUSG) 版權： Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Nov 2014 識別號： ISSN: 0018-9464 識別號： EISSN: 1941-0069 識別號： DOI: 10.1109/TMAG.2014.2326953 識別號： CODEN: IEMGAQ
