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Temperature Dependence of Switching Characteristics in Polyurea-5 Thin Films
In order to investigate the ferroelectric properties of polyurea-5 prepared by vapor-deposition polymerization, we used switching measurements and found that polyurea thin films showed ferroelectric polarization reversal behavior. Ferroelectric switching transients with the amount of reversed polari...
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| Published in: | Japanese Journal of Applied Physics 1998-09, Vol.37 (9S), p.5375 |
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| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c381t-b774799a916ff1f05b6fc69b4c38ca1cde7cf15be62bc3f34d316e2c788215073 |
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| container_issue | 9S |
| container_start_page | 5375 |
| container_title | Japanese Journal of Applied Physics |
| container_volume | 37 |
| creator | Tajitsu, Yoshiro Ishida, Kazufumi Kanbara, Shintarou Ohigashi, Hiroji Date, Munehiro Fukada, Eiichi |
| description | In order to investigate the ferroelectric properties of
polyurea-5 prepared by vapor-deposition polymerization, we used
switching measurements and found that polyurea thin films showed
ferroelectric polarization reversal behavior. Ferroelectric
switching transients with the amount of reversed polarization
P
r
of
20 mC/m
2
were observed for the polymer thin film at room temperature.
This
P
r
is consistent with a polyurea-5 film crystallinity of 30%.
We then found a two-step increase in the switching transients above
50°C. The first increase gives
P
r
of 20 mC/m
2
and the second increase
gives a large
P
r
increment of 200 mC/m
2
which is much larger than the
calculated value of the spontaneous polarization in the single crystal
of polyurea-5. However the second increase with
P
r
of 200 mC/m
2
is
almost independent of applied field
E
and shifts to short time regions
with increasing
E
. These results imply that the second increase with
P
r
of 200 mC/m
2
is caused by ferroelectric switching. |
| doi_str_mv | 10.1143/JJAP.37.5375 |
| format | article |
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polyurea-5 prepared by vapor-deposition polymerization, we used
switching measurements and found that polyurea thin films showed
ferroelectric polarization reversal behavior. Ferroelectric
switching transients with the amount of reversed polarization
P
r
of
20 mC/m
2
were observed for the polymer thin film at room temperature.
This
P
r
is consistent with a polyurea-5 film crystallinity of 30%.
We then found a two-step increase in the switching transients above
50°C. The first increase gives
P
r
of 20 mC/m
2
and the second increase
gives a large
P
r
increment of 200 mC/m
2
which is much larger than the
calculated value of the spontaneous polarization in the single crystal
of polyurea-5. However the second increase with
P
r
of 200 mC/m
2
is
almost independent of applied field
E
and shifts to short time regions
with increasing
E
. These results imply that the second increase with
P
r
of 200 mC/m
2
is caused by ferroelectric switching.</description><identifier>ISSN: 0021-4922</identifier><identifier>EISSN: 1347-4065</identifier><identifier>DOI: 10.1143/JJAP.37.5375</identifier><language>eng</language><ispartof>Japanese Journal of Applied Physics, 1998-09, Vol.37 (9S), p.5375</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c381t-b774799a916ff1f05b6fc69b4c38ca1cde7cf15be62bc3f34d316e2c788215073</citedby><cites>FETCH-LOGICAL-c381t-b774799a916ff1f05b6fc69b4c38ca1cde7cf15be62bc3f34d316e2c788215073</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Tajitsu, Yoshiro</creatorcontrib><creatorcontrib>Ishida, Kazufumi</creatorcontrib><creatorcontrib>Kanbara, Shintarou</creatorcontrib><creatorcontrib>Ohigashi, Hiroji</creatorcontrib><creatorcontrib>Date, Munehiro</creatorcontrib><creatorcontrib>Fukada, Eiichi</creatorcontrib><title>Temperature Dependence of Switching Characteristics in Polyurea-5 Thin Films</title><title>Japanese Journal of Applied Physics</title><description>In order to investigate the ferroelectric properties of
polyurea-5 prepared by vapor-deposition polymerization, we used
switching measurements and found that polyurea thin films showed
ferroelectric polarization reversal behavior. Ferroelectric
switching transients with the amount of reversed polarization
P
r
of
20 mC/m
2
were observed for the polymer thin film at room temperature.
This
P
r
is consistent with a polyurea-5 film crystallinity of 30%.
We then found a two-step increase in the switching transients above
50°C. The first increase gives
P
r
of 20 mC/m
2
and the second increase
gives a large
P
r
increment of 200 mC/m
2
which is much larger than the
calculated value of the spontaneous polarization in the single crystal
of polyurea-5. However the second increase with
P
r
of 200 mC/m
2
is
almost independent of applied field
E
and shifts to short time regions
with increasing
E
. These results imply that the second increase with
P
r
of 200 mC/m
2
is caused by ferroelectric switching.</description><issn>0021-4922</issn><issn>1347-4065</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1998</creationdate><recordtype>article</recordtype><recordid>eNotkMtKAzEYhYMoWKs7HyAP4Iz5c51ZlmqrpWDBcR0y6R8baaclGZG-vTPo6nA4l8VHyD2wEkCKx9VqtimFKZUw6oJMQEhTSKbVJZkwxqGQNefX5Cbnr8FqJWFC1g0eTphc_52QPuEJuy12Hukx0Pef2Ptd7D7pfOeS8z2mmPvoM40d3Rz352HiCkWboUMXcX_It-QquH3Gu3-dko_FczN_KdZvy9f5bF14UUFftMZIU9euBh0CBKZaHbyuWznE3oHfovEBVIuat14EIbcCNHJvqoqDYkZMycPfr0_HnBMGe0rx4NLZArMjCTuSsMLYkYT4BUf-UWs</recordid><startdate>19980901</startdate><enddate>19980901</enddate><creator>Tajitsu, Yoshiro</creator><creator>Ishida, Kazufumi</creator><creator>Kanbara, Shintarou</creator><creator>Ohigashi, Hiroji</creator><creator>Date, Munehiro</creator><creator>Fukada, Eiichi</creator><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19980901</creationdate><title>Temperature Dependence of Switching Characteristics in Polyurea-5 Thin Films</title><author>Tajitsu, Yoshiro ; Ishida, Kazufumi ; Kanbara, Shintarou ; Ohigashi, Hiroji ; Date, Munehiro ; Fukada, Eiichi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c381t-b774799a916ff1f05b6fc69b4c38ca1cde7cf15be62bc3f34d316e2c788215073</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tajitsu, Yoshiro</creatorcontrib><creatorcontrib>Ishida, Kazufumi</creatorcontrib><creatorcontrib>Kanbara, Shintarou</creatorcontrib><creatorcontrib>Ohigashi, Hiroji</creatorcontrib><creatorcontrib>Date, Munehiro</creatorcontrib><creatorcontrib>Fukada, Eiichi</creatorcontrib><collection>CrossRef</collection><jtitle>Japanese Journal of Applied Physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tajitsu, Yoshiro</au><au>Ishida, Kazufumi</au><au>Kanbara, Shintarou</au><au>Ohigashi, Hiroji</au><au>Date, Munehiro</au><au>Fukada, Eiichi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Temperature Dependence of Switching Characteristics in Polyurea-5 Thin Films</atitle><jtitle>Japanese Journal of Applied Physics</jtitle><date>1998-09-01</date><risdate>1998</risdate><volume>37</volume><issue>9S</issue><spage>5375</spage><pages>5375-</pages><issn>0021-4922</issn><eissn>1347-4065</eissn><abstract>In order to investigate the ferroelectric properties of
polyurea-5 prepared by vapor-deposition polymerization, we used
switching measurements and found that polyurea thin films showed
ferroelectric polarization reversal behavior. Ferroelectric
switching transients with the amount of reversed polarization
P
r
of
20 mC/m
2
were observed for the polymer thin film at room temperature.
This
P
r
is consistent with a polyurea-5 film crystallinity of 30%.
We then found a two-step increase in the switching transients above
50°C. The first increase gives
P
r
of 20 mC/m
2
and the second increase
gives a large
P
r
increment of 200 mC/m
2
which is much larger than the
calculated value of the spontaneous polarization in the single crystal
of polyurea-5. However the second increase with
P
r
of 200 mC/m
2
is
almost independent of applied field
E
and shifts to short time regions
with increasing
E
. These results imply that the second increase with
P
r
of 200 mC/m
2
is caused by ferroelectric switching.</abstract><doi>10.1143/JJAP.37.5375</doi></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0021-4922 |
| ispartof | Japanese Journal of Applied Physics, 1998-09, Vol.37 (9S), p.5375 |
| issn | 0021-4922 1347-4065 |
| language | eng |
| recordid | cdi_crossref_primary_10_1143_JJAP_37_5375 |
| source | Institute of Physics |
| title | Temperature Dependence of Switching Characteristics in Polyurea-5 Thin Films |
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