采用热压法制备了奇–奇数聚酰胺(PA)1111铁电薄膜,研究了PA1111的铁电性,并通过探讨极化温度(Tp)、极化时间(tp)和极化电场强度(Ep)对PA1111压电应变常数(d33)的影响来研究PA1111的压电性。结果表明,在频率0.1 Hz,外加电场150 MV/m的...采用热压法制备了奇–奇数聚酰胺(PA)1111铁电薄膜,研究了PA1111的铁电性,并通过探讨极化温度(Tp)、极化时间(tp)和极化电场强度(Ep)对PA1111压电应变常数(d33)的影响来研究PA1111的压电性。结果表明,在频率0.1 Hz,外加电场150 MV/m的条件下,PA1111的矫顽电场(Ec)约为75 MV/m,剩余极化强度(Pr)达47 m C/m2。在相同的测试条件下,PA1111的Ec接近于PA11,但Pr比PA11的低,两者的压电性能相差不大。极化工艺研究表明,随着tp增加,PA1111的d33先迅速增大后趋于稳定;随着Ep的增加和Tp的升高,PA1111的d33随之增大。在Tp为75℃,tp为30 min,Ep为50 MV/m的条件下,PA1111的d33达-3.9 p C/N,压电电压常数达-169 m V·m/N。展开更多
We report discovery of ferromagnetism in(LaCa)(ZnMn)SbO isostructural to the well-studied iron-based superconductor LaFeAs(O1 xFx).Spin is induced by partial substitution of Mn2+for Zn2+,while charge is induced by sub...We report discovery of ferromagnetism in(LaCa)(ZnMn)SbO isostructural to the well-studied iron-based superconductor LaFeAs(O1 xFx).Spin is induced by partial substitution of Mn2+for Zn2+,while charge is induced by substitution of Ca2+for La3+within the parent compound LaZnSbO.Ferromagnetism with Curie temperature(TC)is observed up to 40 K at the spin doping 0.15 by introducing Mn2+into the Zn2+sites for(La0.95Ca0.05)(Zn1 xMnx)SbO.The Hall coefficient measurement indicates p-type carrier for(La0.95Ca0.05)(Zn0.9Mn0.1)SbO with concentration of n^1020cm 3showing anomalous Hall effect below TC.展开更多
文摘采用热压法制备了奇–奇数聚酰胺(PA)1111铁电薄膜,研究了PA1111的铁电性,并通过探讨极化温度(Tp)、极化时间(tp)和极化电场强度(Ep)对PA1111压电应变常数(d33)的影响来研究PA1111的压电性。结果表明,在频率0.1 Hz,外加电场150 MV/m的条件下,PA1111的矫顽电场(Ec)约为75 MV/m,剩余极化强度(Pr)达47 m C/m2。在相同的测试条件下,PA1111的Ec接近于PA11,但Pr比PA11的低,两者的压电性能相差不大。极化工艺研究表明,随着tp增加,PA1111的d33先迅速增大后趋于稳定;随着Ep的增加和Tp的升高,PA1111的d33随之增大。在Tp为75℃,tp为30 min,Ep为50 MV/m的条件下,PA1111的d33达-3.9 p C/N,压电电压常数达-169 m V·m/N。
基金supported by the National Natural Science Foundation of China (Grant No. 11220101003)the Ministry of Science and Technology of China (Grant No. 2013CB921703)
文摘We report discovery of ferromagnetism in(LaCa)(ZnMn)SbO isostructural to the well-studied iron-based superconductor LaFeAs(O1 xFx).Spin is induced by partial substitution of Mn2+for Zn2+,while charge is induced by substitution of Ca2+for La3+within the parent compound LaZnSbO.Ferromagnetism with Curie temperature(TC)is observed up to 40 K at the spin doping 0.15 by introducing Mn2+into the Zn2+sites for(La0.95Ca0.05)(Zn1 xMnx)SbO.The Hall coefficient measurement indicates p-type carrier for(La0.95Ca0.05)(Zn0.9Mn0.1)SbO with concentration of n^1020cm 3showing anomalous Hall effect below TC.
