A New Antiferromagnetic Heavy Fermion Compound: CePd2Al3

Kitazawa, Hideaki; Schank, C.; Thies, S.; Seidel, B.; Geibel, C.; Steglich, F.

doi:10.1143/jpsj.61.1461

Cited by 83 publications

(26 citation statements)

References 8 publications

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“…The discovery of CePd 2 Al 3 (see Ref. 3), which shows antiferromagnetic (AFM) ordering at T N = 2.8 K and electronic specific-heat coefficient ␥ ϳ 380 J / mol K 2 , greatly supplements this family. Its magnetic structure has been determined by neutron diffraction measurements to be a type of ferromagnetic (FM) basal plane that is stacked antiferromagnetically along the c axis.…”

Section: Introductionmentioning

confidence: 99%

Schottky peaks in specific heat induced by electronic change in the antiferromagnetic-ferromagnetic alternating Kondo systemsCe(Pd1−xMx

Sun

Lu²,

Kobayashi

et al. 2004

Phys. Rev. B

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Kondo systems Ce͑Pd 1−x M x ͒ 2 Al 3 (M =Cu or Ag) have been previously shown to display antiferromagnetic (AFM) or ferromagnetic (FM) ordering alternatively then produce a complex phase diagram of AFM-FM-AFM type depending on the substitution amount x. This paper reports the results of specific heat C͑T͒ until high temperatures ͑T ഛ 150 K͒ for the above systems. A Schottky peak is observed for all the samples in the magnetic contributions to specific heat, C mag ͑T͒, while deviating from a typical one on substitution. Unusual Schottky peaks that spread over a very wide temperature range with considerably small values can be confirmed at least around x = 0.2-0.3 where FM ordering just occurs. The unusual Schottky peaks are phenomenologically associated with randomness in the crystal electric field induced by the Pd-M replacements, and the randomness is discussed as a probable origin of the AFM-FM transition. In addition, a comparison between the present systems and the relevant AFM-FM transition system CePd 2 ͑Al 1−x Ga x ͒ 3 suggests that the mechanism for the FM ordering is different in the two cases.

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Section: Introductionmentioning

confidence: 99%

Schottky peaks in specific heat induced by electronic change in the antiferromagnetic-ferromagnetic alternating Kondo systemsCe(Pd1−xMx

Sun

Lu²,

Kobayashi

et al. 2004

Phys. Rev. B

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“…its cerium-based counterpart CePd2AI.~ was shown to be a heavy-electron antiferromagnet [2,3]. We estimated the relevant energy scales, viz.…”

Section: Introductionmentioning

confidence: 99%

Crystal symmetry and electronic properties of heavy-fermion MPd2Al3 (M = Ce, U)

Mentink

Nieuwenhuys

Menovsky

et al. 1994

Physica B: Condensed Matter

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“…2021,22,23,24 . In the case of URu 2 Si 2 the focus has been on understanding the novelty of the physics in the vicinity of the hidden order transition which occurs at T HO =17 K. χ 3 in this case exhibits a very sharp peak at 17.5 K. In the other systems where there is a definite magnetic order, U 2 Zn 17 and (U 1-x ,Th x )Be 13 , an increase in χ 3 to large positive values at the magnetic transition is observed. For the purposes of this paper the focus is rather on the behavior of both the linear and nonlinear susceptibility over a broad temperature region and thus the sharp behavior near magnetic transitions is ignored.…”

mentioning

confidence: 99%

“…In CeRu 2 Si 2 , doping the Ce site with Yttrium shifts T 1 substantially and T 3 follows suit precisely at half the value. Of the other systems where measurements in χ 3 are available, UBe 13 , a cubic system is particularly notable -it has no peak in χ 1 or χ 3 . We summarize all these observations in figure 2, where we plot T 3 vs. T 1 .…”

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confidence: 99%

Universality in the magnetic response of metamagnetic metals

et al. 2014

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We report in this paper, measurements of the nonlinear susceptibility χ 3 (T) in the metamagnetic heavy fermion (HF) compound UPt 3 . At high temperatures, χ 3 (T) < 0 and small. It turns positive for T ≤ 35K, forms a peak at T  10K and then decreases to zero with further decreasing temperature. The peak in χ 3 occurs at a temperature T 3 roughly half of T 1 , the temperature of the maximum in the linear susceptibility. We present results on URu 2 Si 2 and UPd 2 Al 3 to show that this feature is common to other HF materials. A two level model to describe the metamagnetic transition, with separation between the levels being the only energy scale, captures all experimentally observed features. *bss2d@virginia.edu -to whom all correspondence should be addressed.2 Given the myriad ways in which one can arrange atoms to form crystal structures and the possibilities of placing electrons in them the discovery of a common behavioral pattern in the electronic properties often leads to new microscopic insights. In metals, recent discoveries of universal rules such as the Kadowaki-Woods relation 1 which connects the electron effective mass enhancement to the temperature dependence of the resistivity in Fermi liquid systems, the constancy of the Wilson ratio 2 , the Homes plot 3 and other similar scaling laws have assisted in identifying the dominant energy scales, and helped in insights to build microscopic theories.Our purpose in this paper is to show that the magnetic response of many electronic materials that undergo a metamagnetic transition also exhibit universal features in their nonlinear susceptibility. Along with a jump in the magnetization at a critical field, H m , metamagnetism also entails a positive nonlinear susceptibility at low temperatures (it is negative at high temperatures), a peak in the linear susceptibility  1 (T) at a temperature T 1 , a peak in the leading order nonlinear susceptibility  3 (T) >0 at a lower temperature T 3 . These are features widely seen in different materials with diverse lattice structures and electronic properties. Hirose et. al 4 have noted the correlation between H m and the temperature T 1 of the maximum in  1 (T). Goto et. al pointed out earlier that the metamagnetic field H m also correlates with the value of  1 (T) at its maximum 5 . Both of these correlations, found in a number of materials, indicate a dominant presence of one energy scale. In the following we report a new correlation, one between the peak temperatures T 3 for  3 (T) and T 1 namely T 3 =T 1 /2. We also present a new model that captures all of these correlations.For purposes of illustrating this universality we consider the heavy electron class of materials. Within these systems metamagnetic behavior is seen in several uranium compounds 6,7,8,9,10 , cerium compounds 11,12,13,14 , as well as in the ytterbium compounds 15 . Most of these systems possess either hexagonal or tetragonal symmetry. The same behavior is also observed in the skutterudite structure in PrOs 4 Sb 12 a moderately heavy...

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A New Antiferromagnetic Heavy Fermion Compound: CePd₂Al₃

Cited by 83 publications

References 8 publications

Schottky peaks in specific heat induced by electronic change in the antiferromagnetic-ferromagnetic alternating Kondo systemsCe(Pd1−xMx

Schottky peaks in specific heat induced by electronic change in the antiferromagnetic-ferromagnetic alternating Kondo systemsCe(Pd1−xMx

Crystal symmetry and electronic properties of heavy-fermion MPd2Al3 (M = Ce, U)

Universality in the magnetic response of metamagnetic metals

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