Institute of Electrical and Electronics Engineers Inc.;IEEE
摘要:
摘要： The effects of size on the magnetic properties of NdMn 2 O 5 nanorods were studied by X-ray diffractometry, transmission electron microscopy, and measurements of magnetic susceptibility and hysteresis. Five types of nanorods with different axial lengths (〈L C 〉)×diameters(〈L D 〉)-68(36) nm×31(14) nm, 78(30) nm×33(8) nm, 95(36) nm×40(12) nm, 122(48) nm×54(16) nm, 249(46) nm×142(36) nm were made. The axial directions of the five types of nanorod were parallel to the c axis of the crystal. No particular radial direction is found. All samples crystallize with orthorhombic Pbam symmetry. Upon cooling, only the sample with 〈L C 〉 = 249 nm occurs in ferrimagnetic and antiferromagnetic ordering at 80 K and 9 K, respectively. Hysteresis testing reveals a ferrimagnetic domain between 10 K and 50 K only in the 〈L C 〉 = 249 nm sample. These tests reveal that the magnetic critical size of NdMn 2 O 5 is between 〈L C 〉 = 249 nm and 122 nm. For memory storage applications, the estimated maximal capacity of NdMn 2 O 5 nanorods as upstanding pillars is about 32 Gbit/in 2 . 其他題名： TMAG 出版者： IEEE 出版日期： 2014-01 出處： IEEE transactions on magnetics, 2014-01, Vol.50 (1), p.1-3 資源來源： IEEE Electronic Library (IEL) 識別號： ISSN: 0018-9464 識別號： EISSN: 1941-0069 識別號： DOI: 10.1109/TMAG.2013.2276591 識別號： CODEN: IEMGAQ
