PMID- 35684672
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220716
IS  - 1424-8220 (Electronic)
IS  - 1424-8220 (Linking)
VI  - 22
IP  - 11
DP  - 2022 May 27
TI  - High Electrocaloric Effect in Lead Scandium Tantalate Thin Films with 
      Interdigitated Electrodes.
LID - 10.3390/s22114049 [doi]
LID - 4049
AB  - Lead scandium tantalate, Pb(Sc,Ta)O(3), is an excellent electrocaloric material 
      showing large temperature variations, good efficiency, and a broad operating 
      temperature window. In form of multilayer ceramic capacitors integrated into a 
      cooling device, the device can generate a temperature difference larger than 13 
      K. Here, we investigate Pb(Sc,Ta)O(3) in form of thin films prepared using the 
      sol-gel chemical solution deposition method. We report the detailed fabrication 
      process of high-quality films on various substrates such as c-sapphire and fused 
      silica. The main originality of this research is the use of interdigitated top 
      electrodes, enabling the application of very large electric fields in PST. We 
      provide structural and electrical characterisation, as well as electrocaloric 
      temperature variation, using the Maxwell relation approach. Films do not show a 
      B-site ordering. The temperature variation from 7.2 to 15.7 K was measured on the 
      Pb(Sc,Ta)O(3) film on a c-sapphire substrate under the electric field of 1330 
      kV/cm between 14.5  degrees C and 50  degrees C. This temperature variation is the highest 
      reported so far in Pb(Sc,Ta)O(3) thin films. Moreover, stress seems to have an 
      effect on the maximum permittivity temperature and thus electrocaloric 
      temperature variation with temperature in Pb(Sc,Ta)O(3) films. Tensile stress 
      induced by fused silica shifts the "transition" of Pb(Sc,Ta)O(3) to lower 
      temperatures. This study shows the possibility for electrocaloric temperature 
      variation tuning with stress conditions.
FAU - Kovacova, Veronika
AU  - Kovacova V
AUID- ORCID: 0000-0002-9281-3732
AD  - Materials Research and Technology Department, Luxembourg Institute of Science and 
      Technology (LIST), 41 Rue du Brill, L-4422 Belvaux, Luxembourg.
FAU - Glinsek, Sebastjan
AU  - Glinsek S
AUID- ORCID: 0000-0002-5614-0825
AD  - Materials Research and Technology Department, Luxembourg Institute of Science and 
      Technology (LIST), 41 Rue du Brill, L-4422 Belvaux, Luxembourg.
FAU - Girod, Stephanie
AU  - Girod S
AD  - Materials Research and Technology Department, Luxembourg Institute of Science and 
      Technology (LIST), 41 Rue du Brill, L-4422 Belvaux, Luxembourg.
FAU - Defay, Emmanuel
AU  - Defay E
AUID- ORCID: 0000-0003-1462-8969
AD  - Materials Research and Technology Department, Luxembourg Institute of Science and 
      Technology (LIST), 41 Rue du Brill, L-4422 Belvaux, Luxembourg.
LA  - eng
GR  - THERMODIMAT/C20/MS/14718071/Defay/Fonds National de la Recherche/
GR  - CAMELHEAT/C17/MS/11703691/ Defay/Fonds National de la Recherche/
PT  - Journal Article
DEP - 20220527
PL  - Switzerland
TA  - Sensors (Basel)
JT  - Sensors (Basel, Switzerland)
JID - 101204366
SB  - IM
PMC - PMC9185452
OTO - NOTNLM
OT  - electrocalorics
OT  - ferroelectric thin films
OT  - lead scandium tantalate
OT  - thin films deposition
COIS- The authors declare no conflict of interest.
EDAT- 2022/06/11 06:00
MHDA- 2022/06/11 06:01
PMCR- 2022/05/27
CRDT- 2022/06/10 01:25
PHST- 2022/04/28 00:00 [received]
PHST- 2022/05/23 00:00 [revised]
PHST- 2022/05/25 00:00 [accepted]
PHST- 2022/06/10 01:25 [entrez]
PHST- 2022/06/11 06:00 [pubmed]
PHST- 2022/06/11 06:01 [medline]
PHST- 2022/05/27 00:00 [pmc-release]
AID - s22114049 [pii]
AID - sensors-22-04049 [pii]
AID - 10.3390/s22114049 [doi]
PST - epublish
SO  - Sensors (Basel). 2022 May 27;22(11):4049. doi: 10.3390/s22114049.