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Structure, Magnetic Properties, and 151Eu Mössbauer Spectra of the Indium‐rich Phase Eu3Rh2In15
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.4 ) Pub Date : 2020-10-17 , DOI: 10.1002/zaac.202000337
Simon Engelbert 1 , Steffen Klenner 1 , Judith Bönnighausen 1 , Jutta Kösters 1 , Rainer Pöttgen 1
Affiliation  

The indium‐rich intermetallic compound Eu3Rh2In15 was synthesized from the elements in a sealed tantalum ampoule at high temperature. Small silvery single crystals were obtained by slow cooling of the sample. Eu3Rh2In15 was studied by X‐ray diffraction on powders and single crystals. Its tetragonal Eu3Co2In15 type structure was refined from single crystal diffractometer data: P4/mbm, a = 1483.46(7), c = 439.70(3) pm, wR2 = 0.0205, 1092 F2 values and 38 parameters. The In1, In2 and In4 atoms in the Eu3Rh2In15 structure build up planar layers that are a tessellation of triangles, squares and pentagons. These layers are stacked in an AA sequence. The Rh atoms fill the trigonal prisms, Eu2, In3, and In5 square prisms and the Eu1 atoms the pentagonal prisms. The high indium content in Eu3Rh2In15 leads to a broad range of In–In distances (310–370 pm) and substantial In–In bonding within the three‐dimensional indium substructure. Temperature dependent magnetic susceptibility measurements show Curie–Weiss behavior and the experimental magnetic moment of 8.0(1) μB Eu atom–1 is compatible with divalent europium. Magnetization and specific heat data point to long‐range magnetic ordering at 14.0(2) K with a canted spin arrangement. 151Eu Mössbauer spectra confirm the divalent character of europium and underline the complex magnetic ordering. The two crystallographically independent europium sites show different isomer shifts [–11.06(2) mm·s–1 for Eu1 and –9.09(5) mm·s–1 for Eu2] and different magnetic hyperfine fields [16.1(1) T for Eu1 and 32.6(1) T for Eu2].

中文翻译:

富铟相Eu3Rh2In15的结构,磁性和151EuMössbauer谱

在高温下由密封钽安瓿瓶中的元素合成了富铟金属间化合物Eu 3 Rh 2 In 15。通过缓慢冷却样品获得小的银色单晶。通过对粉末和单晶进行X射线衍射研究了Eu 3 Rh 2 In 15。从单晶衍射仪数据中精炼出其四方Eu 3 Co 2 In 15型结构:P 4 / mbm ,a = 1483.46(7),c = 439.70(3)pm,wR 2 = 0.0205,1092 F 2值和38个参数。Eu 3 Rh 2 In 15结构中的In1,In2和In4原子构成了由三角形,正方形和五边形细分的平面层。这些层以AA顺序堆叠。Rh原子填充了三棱柱Eu2,In3和In5方形棱柱,而Eu1原子填充了五棱柱。Eu 3 Rh 2 In 15中的铟含量高,可导致宽范围的In-In距离(310-370 pm)和三维铟子结构内的大量In-In键。依赖于温度的磁化率的测量结果表明μ居里-外斯行为和8.0(1)实验磁矩铕原子-1与二价euro兼容。磁化和比热数据表明在14.0(2)K下具有倾斜的自旋排列的远距离磁排序。151 EuMössbauer光谱证实了the的二价特征并强调了复杂的磁有序性。两个在晶体学上独立的euro位点显示出不同的异构体位移[Eu1为–11.06(2)mm · s –1,Eu2为–9.09(5)mm · s –1 ]和不同的超精细磁场[Eu1为16.1(1)T和32.6(1)T表示Eu2]。
更新日期:2020-10-17
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