One type of characteristic PSD curves as a function of burning current: (a) measured at after sensor has experienced various burning currents ; (b) measured at various burning currents.
vs curves derived from PSD curves after sensor has experienced different burning currents. Filled triangles, without experiencing any large burning current (before ); open circles, after experiencing (after ); open squares, after experiencing (after ).
Tunneling resistance and TMR measured at as a function of burning current, showing that pinholes grow after the burning current is slightly larger than .
Another type of characteristic vs curves after the TMR heads have experienced different maximum burning currents, showing no abnormal peak before and after the breakdown.
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