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self-demagnetisation
self-demagnetisation n. 
/ˌsɛlfdiˌmæɡnədəˈzeɪʃ(ə)n/
Brit. /ˌsɛlfdiːˌmaɡnᵻtʌɪˈzeɪʃn/
, /ˌsɛlfdiːˌmaɡnᵻtʌɪˈzeɪʃn/U.S. /ˌsɛlfdiˌmæɡnəˌtaɪˈzeɪʃ(ə)n/
, /ˌsɛlfdiˌmæɡnəˌtaɪˈzeɪʃ(ə)n//ˌsɛlfdiˌmæɡnədəˈzeɪʃ(ə)n/ΚΠ
1912 Proc. Physical Soc. 24 342 (heading) The self-demagnetisation of annealed steel rods.
2006 Computer Weekly 9 May 35/1 Higher data rates can lead to self-demagnetisation as minute magnetic cells flip their polarity.
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