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The Solid Solution Eu1–xSrxAuIn
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2020-08-31 , DOI: 10.1002/zaac.202000259
Steffen Klenner 1 , Judith Bönnighausen 1 , Rainer Pöttgen 1
Affiliation  

EuAuIn and SrAuIn (TiNiSi type structure, space group Pnma) form a complete solid solution Eu1–xSrxAuIn. Samples with x = 0.2, 0.4, 0.5, 0.6 and 0.8 were prepared by melting of the elements in sealed tantalum ampoules followed by slow cooling. The samples were characterized through Guinier powder patterns. The X‐ray data confirm Vegard type behavior. The crystal structures of Eu0.8Sr0.2AuIn and Eu0.5Sr0.5Au1.02In0.98 were refined from single‐crystal X‐ray diffraction data in order to confirm the Eu/Sr site occupancies. Temperature‐dependent magnetic susceptibility data confirm divalent europium. The Néel temperature linearly drops from 21.0 K for EuAuIn and long‐range magnetic ordering is still present in the x = 0.8 sample with TN = 4.1 K. Low‐field measurements indicate two successive magnetic ordering temperatures for all samples, resulting from a complex interplay of antiferromagnetic and ferromagnetic interactions, similar to the tetrelides EuMgX (X = Si, Ge, Sn). 151Eu Mössbauer spectra confirm the divalent ground state and show complex magnetic hyperfine field splitting at 6 K.

中文翻译:

固溶体Eu1-xSrxAuIn

EuAuIn和SrAuIn(TiNiSi型结构,空间群Pnma)形成一个完整的固溶体Eu 1– x Sr x AuIn。样品用X = 0.2,0.4,0.5,0.6和0.8,通过在密封的安瓿钽,随后缓慢冷却的元件的熔化制备。通过吉尼尔粉末图案表征样品。X射线数据确认Vegard类型的行为。Eu 0.8 Sr 0.2 AuIn和Eu 0.5 Sr 0.5 Au 1.02 In 0.98的晶体结构从单晶X射线衍射数据中提炼出来,以确认Eu / Sr位置占据率。温度相关的磁化率数据证实了二价euro。对于EuAuIn,Néel温度从21.0 K线性下降,x = 0.8的样品中仍存在远距离磁有序,T N = 4.1K 。低场测量表明,由于样品的复杂性,所有样品的两个连续的磁有序温度反铁磁和铁磁相互作用的相互作用,类似于四极化物EuMg XX = Si,Ge,Sn)。151 EuMössbauer光谱确认了二价基态,并显示了在6 K处的复杂磁超精细场分裂。
更新日期:2020-08-31
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