Tunable electrocaloric effect in lead scandium tantalate through calcium doping
Youri Nouchokgwe, Natalya S. Fedorova, Veronika Kovacova, Pranab Biswas, Ivana Gorican, Nejc Suban, Silvo Drnovsek, Matej Sadl, Michele Melchiorre, Binayak Mukherjee, Uros Prah, Guillaume F. Nataf, Torsten Granzow, Mael Guennou, Hana Ursic, Jorge Iñiguez-González, Emmanuel Defay · 2026
Read Tunable electrocaloric effect in lead scandium tantalate through calcium doping by Youri Nouchokgwe, Natalya S. Fedorova, Veronika Kovacova, Pranab Biswas, Ivana Gorican, Nejc Suban, Silvo Drnovsek, Matej Sadl, Michele Melchiorre, Binayak Mukherjee, Uros Prah, Guillaume F. Nataf, Torsten Granzow, Mael Guennou, Hana Ursic, Jorge Iñiguez-González, Emmanuel Defay (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13260448.txt.
Description
Youri Nouchokgwe, Natalya Fedorova, Veronika Kovacova, and a wider team wrote this research paper, published in 2026. It shows that stirring calcium into a leading cooling crystal lets engineers dial its working temperature across a wide range, a step toward fridges with no gases.
The crystal, lead scandium tantalate, cools when a voltage is applied, and peaks near room temperature. Calcium swaps into one site and shifts the transition point down to 258 kelvin or up to 319 kelvin, depending on dose. Heat and charge measurements, plus fine microscopy, revealed a new in-between phase at higher doses. Computer calculations backed the picture. Above a small dose, the effect flipped sign, cooling on voltage removal instead. Under a strong field the crystals changed temperature by two degrees across a ninety-degree span. Stacks of graded crystals could widen cooling devices' reach.
Catalog record
| CREATOR | Youri Nouchokgwe, Natalya S. Fedorova, Veronika Kovacova, Pranab Biswas, Ivana Gorican, Nejc Suban, Silvo Drnovsek, Matej Sadl, Michele Melchiorre, Binayak Mukherjee, Uros Prah, Guillaume F. Nataf, Torsten Granzow, Mael Guennou, Hana Ursic, Jorge Iñiguez-González, Emmanuel Defay |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 62 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |