Magnetic Hardening of Sm2Fe17N3 by Radiation Damage
نویسندگان
چکیده
Pinning type coercivity has been induced in large sø50 mmd particles of Sm2Fe17N3 by irradiation with 5 GeV Pb561 ions. Mössbauer spectroscopy is used to analyze the structure of the defects and estimate their volume. Magnetization measurements indicate that the induced defects are anisotropic in shape. A model of strong pinning by cylindrical defects is employed to deduce a defect radius of order 2 nm from the measured fluence dependence of the coercivity. [S0031-9007(98)07898-3]
منابع مشابه
The Role of Grain Size on Neutron Irradiation Response of Nanocrystalline Copper
The role of grain size on the developed microstructure and mechanical properties of neutron irradiated nanocrystalline copper was investigated by comparing the radiation response of material to the conventional micrograined counterpart. Nanocrystalline (nc) and micrograined (MG) copper samples were subjected to a range of neutron exposure levels from 0.0034 to 2 dpa. At all damage levels, the r...
متن کاملchromium pre-enrichment and hardening by combining cold-work and irradiation in an effort to isolate a radiation damage microstructure in stainless steel without the effects of RIS. Third, to initiate irradiation of reactor pressure vessel steel and Zircaloy
Overall Program Goals for Year One Year one of this project had three major goals. First, to specify, order and install a new high current ion source for more rapid and stable proton irradiation. Second, to assess the use of chromium pre-enrichment and hardening by combining cold-work and irradiation in an effort to isolate a radiation damage microstructure in stainless steel without the effect...
متن کاملRadiation Damage in Silicon Detectors for High-Energy Physics Experiments
Radiation effects in silicon detectors are discussed in view of their application in future high-energy physics experiments. An overview is given of the major changes in the operational parameters due to radiation damage and their origin in the radiation-induced microscopic disorder in the silicon bulk. The principal radiation hardening technologies are described that have been adopted by the h...
متن کاملModified Process for High-Performance Anisotropic Sm2Fe17N3 Magnet Powder
The magnetic properties of an anisotropic Sm2Fe17N3 magnet powder were improved by enhancement of nitrogenation homogeneity. We made the Sm2Fe17 parent material powder by a reduction-diffusion method which contains a reduction-diffusion heat treatment and a subsequent wet process for removal of a CaO by-product. In the present study, as the modified process for the magnet powder, the nitrogenat...
متن کاملAspects of radiation hardness for silicon microstrip detectors
The ways in which radiation damage affects the properties of silicon microstrip detectors are reviewed and discussed in the context of inner tracking or vertexing requirements for the LHC experiments.
متن کامل