Large electrocaloric strength in the (100)-oriented relaxor ferroelectric Pb[(Ni1/3Nb2/3)0.6Ti0.4]O3 single crystal at near morphotropic phase boundary |
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| Affiliation: | 1. Shenzhen Key Laboratory of Special Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, PR China;2. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, PR China;3. Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR;4. Department of Manufacturing and Materials, Cranfield University, Cranfield, Bedfordshire, MK43 0AL, United Kingdom;5. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, PR China;6. State Key Laboratory of Solidification Processing School of Materials Science and Engineering Northwestern Polytechnical University, Xi’an 710072, PR China;1. LMF, Université de Sfax, FSS, Route de Soukra km 3,5-B.P. 1171, 3000 Sfax, Tunisia;2. LPMC, Université de Picardie, 33 rue Saint-Leu, 80039, Amiens Cedex 1, France;3. LRCS, UMR7314, Université de Picardie, 33 rue Saint-Leu, 80039 Amiens Cedex 1, France;1. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong;3. School of Chemical and Molecular Engineering, Zhengzhou University, Zhengzhou, China;1. Institute of Materials and Earth Science, Technische Universität Darmstadt, 64287 Darmstadt, Germany;2. Department of Materials Science & Engineering, University of Connecticut, 06269 CT, USA;1. School of Physics & Optoelectric Engineering, Guangdong University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, People''s Republic of China;2. Laboratory Teaching Center, Guangdong University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, People''s Republic of China;1. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an, 710049, China;2. Department of Materials Science and Engineering, National University of Singapore, Singapore;1. Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;2. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. College of Physics, Qingdao University, 308 Ningxia Road, Qingdao 266071, China;5. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, UK |
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| Abstract: | Relaxor ferroelectric Pb[(Ni1/3Nb2/3)0.6Ti0.4]O3 (PNNT) single crystal with composition close to the morphotropic phase boundary (MPB) was successfully prepared using the molten salt method. The analysis results of XRD and TEM indicated that the as-grown crystal is of almost pure perovskite phase with coexistence of tetragonal and rhombohedral. Typical relaxor behavior was observed when the crystal was aged. Large electrocaloric strength (ΔT/ΔE) of 44.97 mK cm/kV was obtained near the phase transition temperature of paraelectric to ferroelectric, indicating that PNNT is a promising material for application in cooling system. Moreover, it is found that the aging of point defects may make an important contribution to the electrocaloric performance of the single crystal, in addition to the contribution of the transition of phases induced by the electric field. |
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| Keywords: | PNNT single crystal Relaxor ferroelectric Electrocaloric strength MPB |
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