About: http://webisa.webdatacommons.org/227243771

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	As the magnetic material for the carrier core, oxides such as ferrite, iron excess type ferrite, magnetite, and .gamma.-oxide iron, metals such as iron, cobalt and nickel, or alloys thereof can be used.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com