1
|
Plokhikh IV, Khan N, Tsirlin AA, Kuznetsov AN, Charkin DO, Shevelkov AV, Pfitzner A. EuNi2P4, the first magnetic unconventional clathrate prepared via a mechanochemically assisted route. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01566c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first magnetic unconventional clathrate EuNi2P4 has been prepared and its thermodynamic properties have been investigated.
Collapse
Affiliation(s)
- Igor V. Plokhikh
- Institute of Inorganic Chemistry
- University of Regensburg
- 93053 Regensburg
- Germany
| | - Nazir Khan
- Experimental Physics VI
- Center for Correlations and Magnetism
- Institute of Physics
- University of Augsburg
- 86135 Augsburg
| | - Alexander A. Tsirlin
- Experimental Physics VI
- Center for Correlations and Magnetism
- Institute of Physics
- University of Augsburg
- 86135 Augsburg
| | - Alexey N. Kuznetsov
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
- Kurnakov Institute of General and Inorganic Chemistry RAS
- 119991 Moscow
| | | | | | - Arno Pfitzner
- Institute of Inorganic Chemistry
- University of Regensburg
- 93053 Regensburg
- Germany
| |
Collapse
|
2
|
Plokhikh IV, Khan N, Tsirlin AA, Kuznetsov AN, Charkin DO, Shevelkov AV, Pfitzner A. Synthesis, crystal and electronic structures of Pt-rich phosphides EuPt 3P and EuPt 6P 2. Dalton Trans 2019; 48:15272-15282. [PMID: 31580356 DOI: 10.1039/c9dt02845e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new ternary Pt-rich phosphides, EuPt6P2 and EuPt3P, have been prepared via a two-step solid state reaction. Their crystal structures have been determined from powder XRD data. EuPt6P2 is isostructural to SrPt6P2 (cubic, Pa3[combining macron], a = 8.4603(1) Å); its crystal structure comprises corner-sharing Pt6P trigonal prisms hosting Eu2+ cations in the cuboctahedral voids of the framework. EuPt3P is isostructural to the SrPt3P anti-perovskite (P4/nmm, a = 5.7452(1) Å and c = 5.4212(1) Å). Magnetization measurements reveal the magnetic response caused by the Eu2+(4f7) cations. EuPt6P2 is paramagnetic exhibiting no phase transitions down to 1.8 K, whereas EuPt3P orders ferromagnetically below 19 K. Similar to SrPt6P2 and SrPt3P, the new compounds are metallic with states near the Fermi level predominantly formed by the 5d orbitals of Pt.
Collapse
Affiliation(s)
- Igor V Plokhikh
- Institute of Inorganic Chemistry, University of Regensburg, 93053 Regensburg, Germany.
| | | | | | | | | | | | | |
Collapse
|
3
|
Ishida J, Iimura S, Hosono H. Structural Series in the Ternary A–Mn–As System (A = Alkali Metal): Double-Layer-Type CsMn4As3 and RbMn4As3 and Tunnel-Type KMn4As3. Inorg Chem 2018; 57:4997-5003. [DOI: 10.1021/acs.inorgchem.8b00018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
4
|
Plokhikh IV, Charkin DO, Verchenko VY, Kuznetsov AN, Kazakov SM, Tsirlin AA, Shevelkov AV. Structural and Thermodynamic Stability of the "1111" Structure Type: A Case Study of the EuFZnPn Series. Inorg Chem 2016; 55:12409-12418. [PMID: 27934435 DOI: 10.1021/acs.inorgchem.6b02297] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two new compounds with the LaOAgS structure, EuFZnAs (1) and EuFZnSb (2), were obtained via solid state reaction. Both compounds are tetragonal (P4/nmm) with the cell parameters a = 4.1000(1) Å and c = 9.0811(1) Å for 1 and a = 4.2852(1)Å and c = 9.4238(1)Å for 2. The absence of their phosphide analog can be explained based on crystal chemical considerations as well as on quantum-chemical estimates of their thermodynamic stability with respect to EuF2 and EuZn2Pn2. The magnetic response of 1 and 2 is ascribed to the presence of Eu2+ ions. Both compounds are paramagnetic down to low temperatures, where they order antiferromagnetically at ∼5 K and ∼3 K, respectively. They are narrow-gap semiconductors, and EuFZnSb demonstrates a relatively high value of the Seebeck coefficient.
Collapse
Affiliation(s)
- Igor V Plokhikh
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia
| | - Dmitri O Charkin
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia
| | - Valeriy Yu Verchenko
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.,National Institute of Chemical Physics and Biophysics , 12618 Tallinn, Estonia
| | - Alexey N Kuznetsov
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.,N.S. Kurnakov Institute of General and Inorganic Chemistry RAS , 119991 Moscow, Russia
| | - Sergey M Kazakov
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia
| | - Alexander A Tsirlin
- Experimental Physics VI, Center for Correlations and Magnetism, Institute of Physics, University of Augsburg , 86135 Augsburg, Germany
| | - Andrei V Shevelkov
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia
| |
Collapse
|
5
|
Effect of Transition Metal Substitution on the Structure and Properties of a Clathrate-Like Compound Eu₇Cu 44As 23. MATERIALS 2016; 9:ma9070587. [PMID: 28773714 PMCID: PMC5456878 DOI: 10.3390/ma9070587] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 07/06/2016] [Accepted: 07/14/2016] [Indexed: 11/30/2022]
Abstract
A series of substitutional solid solutions—Eu7Cu44−xTxAs23 (T = Fe, Co, Ni)—based on a recently discovered clathrate-like compound (Eu7Cu44As23) were synthesized from the elements at 800 °C. Almost up to 50% of Cu can be substituted by Ni, resulting in a linear decrease of the cubic unit cell parameter from a = 16.6707(1) Å for the ternary compound to a = 16.3719(1) Å for the sample with the nominal composition Eu7Cu24Ni20As23. In contrast, Co and Fe can only substitute less than 20% of Cu. Crystal structures of six samples of different composition were refined from powder diffraction data. Despite very small differences in scattering powers of Cu, Ni, Co, and Fe, we were able to propose a reasonable model of dopant distribution over copper sites based on the trends in interatomic distances as well as on Mössbauer spectra for the iron-substituted compound Eu7Cu36Fe8As23. Ni doping increases the Curie temperature to 25 K with respect to the parent compound, which is ferromagnetically ordered below 17.5 K, whereas Fe doping suppresses the ferromagnetic ordering in the Eu sublattice.
Collapse
|
6
|
Zhang R, Pan M, Zhu M, Tao X, Xia S. Experimental and Theoretical Studies on the Crystal Structure of Ternary Copper Arsenides A
2
Cu
3
As
3
(A = Sr, Eu). Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600385] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rong Zhang
- State Key Laboratory of Crystal MaterialsInstitute of Crystal MaterialsShandong University250100JinanPeople's Republic of China
| | - Ming‐Yan Pan
- State Key Laboratory of Crystal MaterialsInstitute of Crystal MaterialsShandong University250100JinanPeople's Republic of China
| | - Min Zhu
- State Key Laboratory of Crystal MaterialsInstitute of Crystal MaterialsShandong University250100JinanPeople's Republic of China
| | - Xu‐Tang Tao
- State Key Laboratory of Crystal MaterialsInstitute of Crystal MaterialsShandong University250100JinanPeople's Republic of China
| | - Sheng‐Qing Xia
- State Key Laboratory of Crystal MaterialsInstitute of Crystal MaterialsShandong University250100JinanPeople's Republic of China
| |
Collapse
|
7
|
Wang J, Lee K, Kovnir K. Distorted Phosphorus and Copper Square-Planar Layers in LaCu1+xP2 and LaCu4P3: Synthesis, Crystal Structure, and Physical Properties. Inorg Chem 2014; 54:890-7. [DOI: 10.1021/ic502234w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Jian Wang
- Department of Chemistry, University of California—Davis (UC Davis), One Shields Avenue, Davis, California 95616, United States
| | - Kathleen Lee
- Department of Chemistry, University of California—Davis (UC Davis), One Shields Avenue, Davis, California 95616, United States
| | - Kirill Kovnir
- Department of Chemistry, University of California—Davis (UC Davis), One Shields Avenue, Davis, California 95616, United States
| |
Collapse
|
8
|
Charkin DO, Demchyna R, Prots Y, Borrmann H, Burkhardt U, Schwarz U, Schnelle W, Plokhikh IV, Kazakov SM, Abakumov AM, Batuk D, Verchenko VY, Tsirlin AA, Curfs C, Grin Y, Shevelkov AV. Two New Arsenides, Eu7Cu44As23 and Sr7Cu44As23, With a New Filled Variety of the BaHg11 Structure. Inorg Chem 2014; 53:11173-84. [PMID: 25265469 DOI: 10.1021/ic5017615] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dmitri O. Charkin
- Department
of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Roman Demchyna
- National University of Forestry and Wood Technology of Ukraine, Lviv, Ukraine
- Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany
| | - Yurii Prots
- Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany
| | - Horst Borrmann
- Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany
| | - Ulrich Burkhardt
- Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany
| | - Ulrich Schwarz
- Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany
| | - Walter Schnelle
- Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany
| | - Igor V. Plokhikh
- Department
of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Sergey M. Kazakov
- Department
of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Artem M. Abakumov
- Department
of Chemistry, Lomonosov Moscow State University, Moscow, Russia
- EMAT, University of Antwerp, Antwerp, Belgium
| | | | - Valery Yu. Verchenko
- Department
of Chemistry, Lomonosov Moscow State University, Moscow, Russia
- National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | | | - Caroline Curfs
- European Synchrotron Radiation Facility, Grenoble, France
| | - Yuri Grin
- Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany
| | | |
Collapse
|
9
|
Maurya A, Thamizhavel A, Provino A, Pani M, Manfrinetti P, Paudyal D, Dhar SK. Synthesis, crystal and electronic structure of the quaternary magnetic EuTAl4Si2 (T = Rh and Ir) compounds. Inorg Chem 2014; 53:1443-8. [PMID: 24446816 DOI: 10.1021/ic402363s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Single crystals of the quaternary europium compounds EuRhAl4Si2 and EuIrAl4Si2 were synthesized by using the Al-Si binary eutectic as a flux. The structure of the two quaternary compounds has been refined by single crystal X-ray diffraction. Both compounds are stoichiometric and adopt an ordered derivative of the ternary KCu4S3 structure type (tetragonal tP8, P4/mmm). The two compounds reported here represent the first example of a quaternary and truly stoichiometric 1:1:4:2 phase crystallizing with this structure type. In light of our present results, the structure of the BaMg4Si3 compound given in literature as representing a new prototype is actually isotypic with the KCu4S3 structure. Local spin density approximation including the Hubbard U parameter (LSDA + U) calculations show that Eu ions are in the divalent state, with a significant hybridization between the Eu 5d, Rh (Ir) 4d (5d), Si 3p and Al 3p states. Magnetic susceptibility measured along the [001] direction confirms the divalent nature of the Eu ions in EuRhAl4Si2 and EuIrAl4Si2, which order magnetically near ∼11 and ∼15 K, respectively.
Collapse
Affiliation(s)
- Arvind Maurya
- Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research , Colaba, Mumbai 400005, India
| | | | | | | | | | | | | |
Collapse
|