摘要
Rare-earth orthoferrites(RFeO_(3)),which are canted antiferromagnets exhibiting weak ferromagnetism,are potential materials for spintronic devices.The temperature of spin reorientation transition(SRT)in Tm_(1-x)Pr_(x)FeO_(3)(x=0,0.15,0.25,0.5)single crystals shifts to a lower region with the increase of x,attributing to the exchange energy of Pr^(3+)-Fe^(3+)being less than that of Tm^(3+)-Fe^(3+).Both type-I of spin switching(SSW-I)and the type-Ⅱ of spin switching(SSW-Ⅱ)are observed along the a-axis when x=0.15 and 0.2.The changes of magnetic interaction are analyzed through structural distortion and transforming Curi–Weiss fitting.A rare SSW-Ⅱ phenomenon is observed along the c-axis during both the cooling and warming processes when x=0.15,0.25,0.5.In addition,a weak ferromagnetic moment(WFM)component is observed despite the antiferromagnetic behavior at high temperature in Tm_(0.5)Pr_(0.5)FeO_(3) single crystal.The WFM decreases gradually with the increase in temperature,indicating the occurrence of SRT.And the field-induced spin switching(SSW)is observed along the a-axis at 70 K when x=0.5.The magnetic properties of Pr^(3+)doped TmFeO_(3) single crystals are obviously different from TmFeO_(3) and PrFeO_(3) single crystals,indicating the complex magnetic interaction among Pr^(3+),Tm^(3+)and Fe^(3+).The complex and abundant magnetic phenomena in Tm_(1-x)Pr_(x)FeO_(3) single crystals offer significant potential for studying altermagnet and magneto-optical coupling,and are expected to become a new generation of spintronic devices.
基金
supported by the National Natural Science Foundation of China(NSFC,No.12374116)
a fellowship from the China Postdoctoral Science Foundation(Certificate No.2024M751931).
