Mixed valency and first order phase transition in EuPdAs

Michels, G.; Junk, S.; Lossau, N.; Schlabitz, W.; Wohlleben, D.; Johrendt, Dirk; Mewis, A.; Sauer, Ch.; Woike, Th.

doi:10.1007/bf01323547

Cited by 35 publications

(20 citation statements)

References 15 publications

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“…The 151 Eu Mössbauer spectra of mixed-valent EuPdAs reveal a fluctuation between Eu 2+ and Eu 3+ slower than 10 8 Hz, i.e., the europium ions are quasi-static. Thus, two independent Mössbauer signals at δ I ) -10.3 mm/s and δ II ) +0.5 mm/s occur in the Mössbauer spectra below 200 K. 127 This behavior is very similar to EuPtP. 85,91 The series of EuTSn stannides has been investigated by 151 Eu and 119 Sn Mössbauer spectroscopy.…”

Section: Magnetic Propertiesmentioning

confidence: 91%

Equiatomic Intermetallic Europium Compounds: Syntheses, Crystal Chemistry, Chemical Bonding, and Physical Properties

2000

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The crystal chemistry of ternary equiatomic europium compounds EuTX (T ) transition metal; X ) element of the III, IV, or V main group) is reviewed. Besides preparation techniques we have especially focused on the structure-property relationships and peculiarities in chemical bonding. A main interest in these compounds is the valence state of the europium atoms. The magnetic susceptibility and electrical conductivity data, 151 Eu Mössbauer spectroscopic results and L III X-ray absorption experiments are discussed in detail.

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Section: Magnetic Propertiesmentioning

confidence: 91%

Equiatomic Intermetallic Europium Compounds: Syntheses, Crystal Chemistry, Chemical Bonding, and Physical Properties

2000

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“…Inhomogeneous mixed-valence associated with Verwey-transitions have been observed in Eu 3 S 4 [7], Eu 4 As 3 [8] and in the metallic compounds EuPtP [9,10], EuPdAs [11] and EuNiP [12,13].…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of Mixed‐valence Compound Eu₅Zr₃S₁₂

Jakubcová

Schappacher

Pöttgen

et al. 2009

Zeitschrift anorg allge chemie

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“…They found that on annealing at 950 ºC, ErPdSn and TmPdSn compounds adopt hexagonal Fe2P-type structure. EuPdAs crystallizes in hexagonal structure [97]. Marazza et al [98] reported that RPdSb (R=La-Sm, Gd, Tb) crystallize in CaIn2 type hexagonal structure, while compounds with R=Dy to Yb crystallize in MgAgAs type cubic structure.…”

Section: Introductionmentioning

confidence: 99%

Review on magnetic and related properties of RTX compounds

Gupta

Суреш

2015

Journal of Alloys and Compounds

260

124

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RTX (R=rare earths, T= 3d/4d/5d, transition metals such as Sc, Ti, Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au, and X=p-block elements such as Al, Ga, In, Si, Ge, Sn, As, Sb, Bi) series is a huge family of intermetallics compounds. These compounds crystallize in different crystal structures depending on the constituents. Though these compounds have been known for a long time, they came to limelight recently in view of the large magnetocaloric effect (MCE) and magnetoresistance (MR) shown by many of them. Most of these compounds crystallize in hexagonal and tetragonal crystal structures. Some of them show crystal structure modification with annealing temperature; while a few of them show iso-structural transition in the paramagnetic regime. Their magnetic ordering temperatures vary from very low temperatures to temperatures well above room temperature (~510 K). Depending on the crystal structure, they show a variety of magnetic and electrical properties.These compounds have been characterized by means of a variety of techniques/measurements such as x-ray diffraction, neutron diffraction, magnetic properties, heat capacity, magnetocaloric properties, electrical resistivity, magnetoresistance, thermoelectric power, thermal expansion, Hall effect, optical properties, XPS, Mössbauer spectroscopy, ESR, μSR, NMR, NQR etc. Some amount of work on theoretical calculations on electronic structure, crystal field interaction and exchange interactions has also been reported. The interesting aspect of this series is that they show a variety of physical properties such as Kondo effect, heavy fermion behavior, spin glass state, intermediate valence, superconductivity, multiple magnetic transitions, metamagnetism, large MCE, large positive as well as negative MR, spin orbital compensation, magnetic polaronic behavior, pseudo gap effect etc.Except Mn, no other transition metal in these compounds possesses considerable magnetic moments.Because of this RMnX compounds in general have high ordering temperatures. Interstitial modification using hydrogen and nitrogen is found to alter their crystal structures and magnetic properties considerably. RTX compounds also show interesting pressure effects on their structural and magnetic properties. In summary, these compounds show variety of physical properties over a wide range of temperatures. This review is intended to cover all the important results obtained in this family, particularly in the last few years.

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Mixed valency and first order phase transition in EuPdAs

Cited by 35 publications

References 15 publications

Equiatomic Intermetallic Europium Compounds: Syntheses, Crystal Chemistry, Chemical Bonding, and Physical Properties

Equiatomic Intermetallic Europium Compounds: Syntheses, Crystal Chemistry, Chemical Bonding, and Physical Properties

Structure and Properties of Mixed‐valence Compound Eu₅Zr₃S₁₂

Review on magnetic and related properties of RTX compounds

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Mixed valency and first order phase transition in EuPdAs

Cited by 35 publications

References 15 publications

Equiatomic Intermetallic Europium Compounds: Syntheses, Crystal Chemistry, Chemical Bonding, and Physical Properties

Equiatomic Intermetallic Europium Compounds: Syntheses, Crystal Chemistry, Chemical Bonding, and Physical Properties

Structure and Properties of Mixed‐valence Compound Eu5Zr3S12

Review on magnetic and related properties of RTX compounds

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Structure and Properties of Mixed‐valence Compound Eu₅Zr₃S₁₂