Hidden variable in the electrocaloric effect of ferroics

Kashikar, Ravi; Chatterjee, Subhashree; Taofeek, Folarin Shola; Barman, Abhisikta; Barman, Shubhankar; Kar-Narayan, Sohini; Datta, Anuja; Lisenkov, Sergey; Mukherjee, Devajyoti; Ponomareva, I.

doi:10.1103/physrevmaterials.6.124403

Hidden variable in the electrocaloric effect of ferroics

Journal Article · Mon Dec 05 00:00:00 EST 2022 · Physical Review Materials

DOI:https://doi.org/10.1103/physrevmaterials.6.124403· OSTI ID:1903203

Kashikar, Ravi ^[1]; ^[2]; Taofeek, Folarin Shola ^[3]; ^[2]; Barman, Shubhankar ^[2]; ^[4]; ^[2]; Lisenkov, Sergey ^[3]; ^[2]; Ponomareva, I. ^[3]

Univ. of South Florida, Tampa, FL (United States); University of South Florida
Indian Association for the Cultivation of Science, Kolkata (India)
Univ. of South Florida, Tampa, FL (United States)
Univ. of Cambridge (United Kingdom)

Caloric effects allow for temperature control through adiabatic application of external fields and are actively explored for solid-state refrigeration. The common wisdom is that the application of ultrahigh fields enhances the effects, thus providing a route to their practical applications. Here, using the ferroelectric relaxor (Ba, Ca)(Ti, Zr)O₃, we demonstrate that in ferroics, which are the prime candidates for such application, this is not true in general and that caloric effects can be enhanced through the reduction of the applied field. The explanation of such a counterintuitive response is in the dependence of the electrocaloric effect on the effective poling field that can be regarded as a “hidden” variable of the caloric effects.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of South Florida, Tampa, FL (United States)

Sponsoring Organization:: European Research Council (ERC); Government of India; Science and Engineering Research Board (SERB); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: SC0005245

OSTI ID:: 1903203

Journal Information:: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 12 Vol. 6; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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