wherein, the second voltage application electrode comprises a transparent electrode formed over {HEAD ~ a surface} of {TAIL ~ the second phase} changing layer and a voltage supply portion with a resistance that is lower than that of the transparent electrode, and 
of
wherein , the second voltage application electrode comprises a transparent electrode formed over { HEAD ~ a surface } of { TAIL ~ the second phase } changing layer and a voltage supply portion with a resistance that is lower than that of the transparent electrode , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH