Handbook of Inorganic Substances

Villars, P.; Cenzual, Karin; Gladyshevskii, R.

doi:10.1515/9783110311747

Cited by 22 publications

(24 citation statements)

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“…[2]. The value of a derived for EuCr 2 Al 20 significantly deviates from a smooth curve joining the a values reported for NdCr 2 Al 20 (a ¼14.50 Å) [14]), SmCr 2 Al 20 (a ¼14.484(2) Å [15]), GdCr 2 Al 20 (a ¼14.4832(4) Å [13]) and TbCr 2 Al 20 (a ¼14.471 Å [21]), which delineates the lanthanide contraction in the RCr 2 Al 20 series. This feature indicates a divalent character of the europium ions in the compound examined.…”

Section: Methods Of Calculationsmentioning

confidence: 45%

Magnetic properties of EuCr2Al20

Swatek

Kaczorowski

2016

Journal of Magnetism and Magnetic Materials

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Section: Methods Of Calculationsmentioning

confidence: 45%

Magnetic properties of EuCr2Al20

Swatek

Kaczorowski

2016

Journal of Magnetism and Magnetic Materials

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“…The primary question is which alloy system we should select for the exploration. In the recent database [17], the hexagonal ZrNiAl-type and tetragonal Mo 2 FeB 2 -type structures can be found in more than 560 and 280 ternary alloy systems, respectively. Among them, both types are formed in more than 120 alloy systems.…”

Section: Metallurgical Approach To New Type Of Dodecagonal Quasicrystalmentioning

confidence: 99%

“…In this structure Yb atoms are located at the vertices of triangle-square tiling, and the magnetic property of this type of structure was discussed from the viewpoint of geometrical frustration forming the Shastry-Sutherland lattice [15]. Although these two phases are frequently formed as adjacent phases in several alloy systems including rare-earth elements or actinides [16,17], their physical properties have been discussed individually.…”

Section: Introductionmentioning

confidence: 99%

Interpretation of some Yb-based valence-fluctuating crystals as approximants to a dodecagonal quasicrystal

Ishimasa

Mihalkovič

Deguchi

et al. 2018

Philosophical Magazine

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The hexagonal ZrNiAl-type (space group: P ! 6 2m) and the tetragonal Mo 2 FeB 2 -type (space group: P4/mbm) structures, which are frequently formed in the same Yb-based alloys and exhibit physical properties related to valence-fluctuation, can be regarded as approximants of a hypothetical dodecagonal quasicrystal. Using Pd-Sn-Yb system as an example, a model of quasicrystal structure has been constructed, of which 5-dimensional crystal (space group: P12/mmm, a DD =5.66 Å and c=3.72 Å) consists of four types of acceptance regions located at the following crystallographic sites; Yb [00000], Pd[1/3 0 1/3 0 1/2], Pd[1/3 1/3 1/3 1/3 0]and Sn[1/2 00 1/2 1/2]. In the 3-dimensional space, the quasicrystal is composed of three types of columns, of which c-projections correspond to a square, an equilateral triangle and a 3-fold hexagon. They are fragments of two known crystals, the hexagonal α-YbPdSn and the tetragonal Yb 2 Pd 2 Sn structures. The model of the hypothetical quasicrystal may be applicable as a platform to treat in a unified manner the heavy fermion properties in the two types of Yb-based crystals. ! 6 2m) and the other tetragonal Mo 2 FeB 2 -type (space group: P4/mbm) structures. Such Yb-based crystals have been studied intensively for the last decade from the viewpoint of valence-fluctuation, and competition between the Kondo effect and the Ruderman-Kittel-Kasuya-Yosida interaction. The former, Kondo effect, favors a nonmagnetic ground state, and the latter magnetic ordered state. Competition of the two effects gives rise to intriguing phenomena such as heavy fermions, non-fermi liquid and quantum criticality. In the alloy system of Yb-Pd-Sn, both types of structures are formed [8,9]. The hexagonal α-YbPdSn belonging to ZrNiAl-type is formed as a low-temperature phase

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“…An improved coercivity has been reported in magnets such as (Fe,Co) 2 B and Ce(Co,Fe,Cu) 5 after the incorporation of small amount of Ta 6,7 . While the Co-Ta phase diagram shows up to seven stable binary phases 8,9 , only two structures have been found in the phase diagram of Fe-Ta: Laves phase (C14) Fe 2 Ta space group (SG) 194, P6 3 /mmc and µ-phase FeTa SG 166, R-3m. The Fe 2 Ta structure is a paramagnet in which either Fe or Ta excess can induce a ferromagnetic ordering at low temperatures ( < ∼ 150 K) 10 .…”

Section: Introductionmentioning

confidence: 99%

“…The other known stable crystalline phase, µ-phase FeTa, is an antiferromagnet with Néel temperature around 336 K 13 . Additionally, small amount of Ta can also be inserted into the Fe-bcc structure 8 . In the case of structurally amorphous systems, Fe 9 Ta thin films have been found to exhibit characteristics of a soft ferromagnetic material with very low coercivities (1−10 mT), saturation magnetization around 2 T and Extraordinary Hall Effect 14 .…”

Section: Introductionmentioning

confidence: 99%

Computational screening of Fe-Ta hard magnetic phases

et al. 2020

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In this work we perform a systematic calculation of the Fe-Ta phase diagram to discover novel hard magnetic phases. By using structure prediction methods based on evolutionary algorithms, we identify two new energetically stable magnetic structures: a tetragonal Fe 3 Ta (space group 122) and cubic Fe 5 Ta (space group 216) binary phases. The tetragonal structure is estimated to have both high saturation magnetization (µ 0 M s =1.14 T) and magnetocrystalline anisotropy (K 1 =2.17 MJ/m 3 ) suitable for permanent magnet applications. The highthroughput screening of magneto-crystalline anisotropy also reveals two low energy metastable hard magnetic phases: Fe 5 Ta 2 (space group 156) and Fe 6 Ta (space group 194), that may exhibit intrinsic magnetic properties comparable to SmCo 5 and Nd 2 Fe 14 B, respectively.

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Handbook of Inorganic Substances

Cited by 22 publications

References 0 publications

Magnetic properties of EuCr2Al20

Magnetic properties of EuCr2Al20

Interpretation of some Yb-based valence-fluctuating crystals as approximants to a dodecagonal quasicrystal

Computational screening of Fe-Ta hard magnetic phases

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