Modulation of ionic arrangement in polar magnet by chemical pressure  

作　　者：Shuang Zhao Jinjin Yang Yifeng Han Meixia Wu Man-Rong Li 

机构地区：[1]Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,School of Chemistry,Sun Yat-sen University,Guangzhou 510006,China [2]Institute of Semiconductors,Guangdong Academy of Sciences,Guangzhou 510650,China

出　　处：《Chinese Chemical Letters》2023年第3期502-506,共5页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(NSFC,Nos.21875287,22090041,22105228 and 11804404);the China Postdoctoral Science Foundation(No.2021M693603)。

摘　　要：The similarity of local structure-connection pattern and volumetrically compressive strain between host and guest phases can be used to stabilize heteroid metastable matter and tune the local structure and properties.Here a series of metastable ABO_(3)(A=Mn;B=Mn_(0.5)Mo_(0.5),Mn_(1/3)Ta_(2/3),and Mn_(0.5)Ta_(0.5)) were trapped in LiTaO_(3) to form solid-solutions,where the difference of solid solubility limit reveals the barrier of size effect on chemical pressure.All samples show antiferromagnetic characters,in which the(LiTaO_(3))_(1-x)-[Mn(Mn_(0.5)Mo_(0.5))O_(3)]_(x) series exhibit more complex magnetic and dielectric behaviors with the increasing of metastable guest phase,stemming from the complex interactive mechanism between Mn^(2+)and Mo^(6+).The cell parameter variation of (LiTaO_(3))_(1-z)-[Mn(Mn_(0.5)Ta_(0.5))O_(3)]_zshows a more regularly changing tendency,on account of the smallest size barrier.These findings show that chemical pressure can effectively stimulate the physical pressure to intercept and modulate a metastable phase at atomic-scale by compressibility effect between like structures at ambient pressure.

关 键 词：Chemical pressure Trapping metastable-phase Cationic arrangement ANTIFERROMAGNETISM DIELECTRICITY 

分 类 号：O641.3[理学—物理化学]