摘要
The rare-earth nickelates(RENiO_(3)) exhibit an exceptional complex electronic phase diagram and multiple electronic phase transitions that enrich promising applications in correlated electronic devices beyond conventional semiconductors.Nevertheless,the practical applications of RENiO_(3) are challenged by their intrinsic thermodynamic metastability in material synthesis and high material cost.Therefore,developing an economical strategy to achieve the batch synthesis of RENiO_(3) is of vital importance.In this work,we enlarged the synthesis amount of RENiO_(3) up to 20 g per batch using chloride(KCI) assisted molten salt reaction.By optimizing the reaction conditions,the powder of RENiO_(3) with the cubic shape and average size of ~2μm was effectively synthesized,while their phase purity exceeded 95%.In addition,the cost to synthesize RENiO_(3) was further reduced by using rare-earth extraction intermediate products as the raw materials,instead of using the pure rare-earth precursors.It also achieved wide adjustments in the metal-to-insulator-transition temperature from160 to 420 K without significantly reducing the transition sharpness.By enlarging the synthesis amount and the reducing the cost,it paves the way to the device application of RENiO_(3).
出处
《Rare Metals》
SCIE
EI
CAS
CSCD
2022年第10期3495-3503,共9页
稀有金属(英文版)
基金
financially supported by the National Key Research and Development Program of China (No. 2021YFA0718900)
the National Natural Science Foundation of China (Nos.52073090 and 62074014)
the Fundamental Research Funds for the Central Universities (No.FRF-TP-19-023A3Z)
Beijing New-star Plan of Science and Technology (No. Z191100001119071)。