Note 1 to entry: The pinning force density, $F_{\text{p}}$ , is typically given by $F_{\text{p}}\propto {B_{\text{c}2}\text{(}T\text{)}}^{m}f\text{(}b\text{)}$ , where m is a real number, $f\text{(}b\text{)}$ is a function of the reduced magnetic flux density $b={B/B}_{\text{c}2}$ and $B_{\text{c}2}={\mu }_0{H}_{\text{c2}}$ , where ${\mu }_{\text{0}}$ is the magnetic constant and $H_{\text{c2}}$ is the upper critical field strength.

Note 2 to entry: This entry was numbered 815-12-26 in IEC 60050-815:2015.