Magnetic and transport properties of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CePd</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Al</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> single crystal

Klicpera, M.; Doležal, Petr; Prokleška, Ján; Prchal, J.; Javorský, P.

doi:10.1016/j.jallcom.2015.03.095

Cited by 11 publications

(7 citation statements)

References 27 publications

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“…Notice that the major component is along the a axis, but the component along the c axis is non-negligible. The maximum magnetic moment is significantly lower than the magnetic moment of the Ce 3+ free ion, which is quite consistent with the expected reduction of magnetic moment due to the influence of the crystal field and it is fully coherent with our magnetic measurement [24]. The fit of the calculated magnetic structure to the measured data is presented in Fig.…”

Section: Magnetic Structure Of Cepd 2 Alsupporting

confidence: 89%

“…As the excitation energies in CePd 2 Al 2−x ,Ga x with x 0.8 are almost the same regardless the crystal structure, the agreement is very good also at higher temperatures in the tetragonal phase. The structural and magnetic phase transitions reveal themselves as anomalies in the specific heat at temperatures corresponding to those determined by our magnetization and electrical resistivity studies [23,24]. Note the sharp anomaly for CePd 2 Al 1.2 Ga 0.8 compared to rather broad ones in compounds with higher Ga content.…”

Section: -11supporting

confidence: 63%

“…We further investigated the influence of Ga substitution on the spectra by means of neutron scattering techniques. [24]. The nonmagnetic LaPd 2 Al 2 undergoes the same type of structural phase transition as its Ce counterpart (T LaPd 2 Al 2 struc = 91.5 K) [13] excluding a magnetoelastic origin of the phase transition.…”

Section: Introductionmentioning

confidence: 92%

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Magnetic structures and excitations in CePd2(Al,Ga)2 series: Development of the “vibron” states

et al. 2017

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CePd 2 Al 2−x Ga x compounds crystallizing in the tetragonal CaBe 2 Ge 2 -type structure (space group P 4/nmm) and undergoing a structural phase transition to an orthorhombic structure (Cmme) at low temperatures were studied by means of neutron scattering. The amplitude-modulated magnetic structure of CePd 2 Al 2 is described by an incommensurate propagation vector k = (δ x , 1 2 + δ y ,0) with δ x = 0.06 and δ y = 0.04. The magnetic moments order antiferromagnetically within the ab planes stacked along the c axis and are arranged along the direction close to the orthorhombic a axis with a maximum value of 1.5(1) μ B /Ce 3+ . CePd 2 Ga 2 reveals a magnetic structure composed of two components: the first is described by the propagation vector, 0), and the second one propagates with k 2 = (0, 1 2 ,0). The magnetic moments of both components are aligned along the same direction-the orthorhombic [100] direction-and their total amplitude varies depending on the mutual phase of magnetic moment components on each Ce site. The propagation vectors k 1 and k 2 describe also the magnetic structure of substituted CePd 2 Al 2−x Ga x compounds, except the one with x = 0.1. CePd 2 Al 1.9 Ga 0.1 with magnetic structure described by k and k 1 stays on the border between pure CePd 2 Al 2 and the rest of the series. Determined magnetic structures are compared with other Ce 112 compounds. Inelastic neutron scattering experiments disclosed three nondispersive magnetic excitations in the paramagnetic state of CePd 2 Al 2 , while only two crystal field (CF) excitations are expected from the splitting of ground state J = 5 2 of the Ce 3+ ion in a tetragonal/orthorhombic point symmetry. Three magnetic excitations at 1.4, 7.8, and 15.9 meV are observed in the tetragonal phase of CePd 2 Al 2 . A structural phase transition to an orthorhombic structure shifts the first excitation up to 3.7 meV, while the other two excitations remain at almost the same energy. The presence of an additional magnetic peak is discussed and described within the Thalmeier-Fulde CF-phonon coupling (i.e., magnetoelastic coupling) model generalized to the tetragonal point symmetry. The second parent compound CePd 2 Ga 2 does not display any sign of additional magnetic excitation. The expected two CF excitations were observed. The development of magnetic excitations in the CePd 2 Al 2−x Ga x series is discussed and crystal field parameters determined.

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Section: Magnetic Structure Of Cepd 2 Alsupporting

confidence: 89%

Section: -11supporting

confidence: 63%

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Magnetic structures and excitations in CePd2(Al,Ga)2 series: Development of the “vibron” states

et al. 2017

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“…Let us now compare the magnetic properties with the closely related CePd 2 Al 2 and CePd 2 Ga 2 (the structural properties are then compared in the next paragraphs). All three compounds exhibit antiferromagnetic order with T N = 2.0, 2.3, and 2.7 K in CePt 2 Al 2 , CePd 2 Ga 2 , and CePd 2 Al 2 , respectively. , The cerium magnetic moments lie in the plane perpendicular to the c -axis in CePd 2 Al 2 and CePd 2 Ga 2 . The same type of arrangement can also be expected in CePt 2 Al 2 on the basis of the presented results (be aware that the [110] direction in the orthorhombic phase corresponds to the [100] direction in the tetragonal phase).…”

Section: Discussionmentioning

confidence: 92%

“…All three compounds exhibit antiferromagnetic order with T N = 2.0, 2.3, and 2.7 K in CePt 2 Al 2 , CePd 2 Ga 2 , and CePd 2 Al 2 , respectively. 22,23 The cerium magnetic moments lie in the plane perpendicular to the c-axis in CePd 2 Al 2 and CePd 2 Ga 2 . The same type of arrangement can also be expected in CePt 2 Al 2 on the basis of the presented results (be aware that the [110] CePd 2 Al 2 compared to those of CePt 2 Al 2 and CePd 2 Ga 2 .…”

Section: ■ Discussionmentioning

confidence: 99%

CePt₂Al₂: Structural and Bulk Properties

et al. 2020

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This work is focused on the structural and physical properties of CePt 2 Al 2 , an intermetallic compound. At room temperature, the modulated orthorhombic structure Cmme(a00)000, with q⃗ = (0.481, 0, 0) has been determined by single-crystal X-ray diffraction supplemented by dependence of lattice parameters above room temperature for which the X-ray powder diffraction was used. The compound undergoes a structural transition to a tetragonal structure above room temperature. This transition exhibits 50 °C hysteresis and creates a domain structure in the sample. The magnetic behavior has been studied by specific heat, magnetization, and transport measurements in the temperature range between 0.5 and 300 K. Specific heat and susceptibility shows an antiferromagnetic order below 2 K. On the basis of electrical resistivity and other bulk measurements, CePt 2 Al 2 can be considered a Kondo lattice material. The presence of a modulated crystal structure opens the possibility of a charge density wave state in CePt 2 Al 2 as observed for (Re)Pt 2 Si 2 .

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