fɔːɹ sˌʌm mətˈɪɹiəlz, ðə mˈoʊʃən ʌv ᵻlˈɛktɹɑːnz fˈɑːloʊz lˈuːps ðæt dᵻpˈɛnd ɔnðɪ ɐplˈaɪd mæɡnˈɛɾɪk fˈiːld, bˌʌt nˌɑːt ɛɡzˈæktli ðə sˈeɪm wˈeɪ.
For some materials, the motion of electrons follows loops that depend on the applied magnetic field, but not exactly the same way.