Magnetization, Resistivity and Specific Heat of Hexagonal R2Ni12P7 with Filled-Cr12P7 Structure
Magnetization, Resistivity and Specific Heat of Hexagonal R2Ni12P7 with Filled-Cr12P7 Structure
复制标题
填充Cr12P7结构六方R2Ni12P7的磁化强度、电阻率和比热
DOI：
10.1143/jpsj.81.074601
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T. Nakano
中科院分区：
文献类型：
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作者：
左右田稔;益田隆嗣;T. Nakano
我们用Sn助熔剂法制备了六方晶系R2 Ni 12 P7（R= Sm，Gd-Lu）单晶样品，并测量了它们的磁化强度、电阻率和比热。结果表明，Gd_2Ni_（12）P_7和Ho_2Ni_（12）P_7中存在反铁磁有序，Dy_2Ni_（12）P_7和Er_2Ni_（12）P_7中存在铁磁有序，Sm_2Ni_（12）P_7、Tb_2Ni_（12）P_7和Tm_2Ni_（12）P_7中存在类铁磁有序.而Yb_2Ni_（12）P_7在低温区处于重费米子态。在R_2Ni_（12）P_7（R= Gd，Tb，Dy）中，在低于磁转变温度时观察到比热峰的峰型异常，表明有序态的R_3 ~+离子J多重峰发生塞曼分裂.
We prepared single-crystal samples of hexagonalR2Ni12P7(R= Sm, Gd–Lu) using a Sn-flux method, and measured their magnetization, resistivity, and specific heat. The antiferromagnetic order in Gd2Ni12P7and Ho2Ni12P7, the ferromagnetic order in Dy2Ni12P7and Er2Ni12P7, and the ferromagnetic-like order in Sm2Ni12P7, Tb2Ni12P7, and Tm2Ni12P7were evidenced by the results of the measurements. In contrast, we found that Yb2Ni12P7is in a heavy fermion state at low-temperature region. Hump-type anomalies in specific heat were observed below the magnetic transition temperature inR2Ni12P7(R= Gd, Tb, and Dy), indicating the Zeeman splitting of theJ-multiplet of theR3+ion in the ordered state.