Scalar Order in PrFe4P12 Studied by Thermal Expansion and Magnetostriction

Tayama, Takashi; Isobe, Yuta; Sakakibara, Toshiro; Sugawara, Hitoshi; Sato, Hideyuki

doi:10.1143/jpsj.78.044708

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…The electrical resistivity, specific heat and magnetic susceptibility show sharp anomalies at T A =6.5 K at zero magnetic field indicating a clear phase transition [4]. This phase transition is suppressed by external magnetic field and disappears at B=6.9 T along [1,1,1] direction [5]. The neutron diffraction experiments did not observe any magnetic signal below T A indicating that this phase transition is nonmagnetic [6].…”

Section: Introductionmentioning

confidence: 93%

Growth of Single Crystal and Effects of Electron Doping in Filled Skutterudite Compound PrFe4P12

Hao

Iwasa

Liu

et al. 2013

AMR

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PrFe4P12shows an anomalously phase transition from a heavy fermion (HF) state to a non-magnetic ordered state. We prepared single crystal sample of Pr (Fe1-xCox)4P12by Sn-flux method to investigate the effects of electron doping. The distinct change of magnetic property was observed. The phase transition of PrFe4P12rapidly disappears when doped rate x=0.03. This result indicates that the d-electron plays an important role in formation of Low-temperutre phase and HF state of PrFe4P12.

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Section: Introductionmentioning

confidence: 93%

Growth of Single Crystal and Effects of Electron Doping in Filled Skutterudite Compound PrFe4P12

Hao

Iwasa

Liu

et al. 2013

AMR

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“…It turns out, however, that the appearance of true multipolar order, that is, of rank higher than dipolar order, is actually rare in solid state compounds. Thus far, true multipolar order has been discovered, or predicted, for about a dozen crystalline materials, such as, CeB 6 , [10][11][12][13][14][15][16][17][18][19][20][21] R 3 Pd 20 X 6 (R: Ce, Pr, X: Si, Ge), [22][23][24][25][26][27][28][29][30][31][32] PrPb 3 , [33][34][35][36][37][38][39][40][41][42] PrMg 3 , [43][44][45][46] PrFe 4 P 12 , [47][48][49][50][51][52][53][54][55][56][57][58]…”

Section: Introductionmentioning

confidence: 99%

First-principles Theory of Magnetic Multipoles in Condensed Matter Systems

2018

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The multipole concept, which characterizes the spacial distribution of scalar and vector objects by their angular dependence, has already become widely used in various areas of physics. In recent years it has become employed to systematically classify the anisotropic distribution of electrons and magnetization around atoms in solid state materials. This has been fuelled by the discovery of several physical phenomena that exhibit unusual higher rank multipole moments, beyond that of the conventional degrees of freedom as charge and magnetic dipole moment. Moreover, the higher rank electric/magnetic multipole moments have been suggested as promising order parameters in exotic hidden order phases. While the experimental investigations of such anomalous phases have provided encouraging observations of multipolar order, theoretical approaches have developed at a slower pace. In particular, a materials' specific theory has been missing. The multipole concept has furthermore been recognized as the key quantity which characterizes the resultant configuration of magnetic moments in a cluster of atomic moments. This cluster multipole moment has then been introduced as macroscopic order parameter for a noncollinear antiferromagnetic structure in crystals that can explain unusual physical phenomena whose appearance is determined by the magnetic point group symmetry. It is the purpose of this review to discuss the recent developments in the first-principles theory investigating multipolar degrees of freedom in condensed matter systems. These recent developments exemplify that ab initio electronic structure calculations can unveil detailed insight in the mechanism of physical phenomena caused by the unconventional, multipole degree of freedom.These compounds have in common that the exotic multipolar electric or magnetic distribution occurs on the lanthanide or actinide ion and are thus generated by the f electrons.More general, typical features of f electron systems are localized character, that tends to enforce the strong electron-electron repulsion, a significant orbital degree of freedom, allowing for anisotropic orbital states, and strong spin-orbit (S-O) coupling which leads to entangled spin and orbital moments. * michito.suzuki@riken.jp 2/67

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Giant Anisotropic Magnetoresistance due to Purely Orbital Rearrangement in the Quadrupolar Heavy Fermion Superconductor PrV2Al20

et al. 2019

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We report the discovery of giant and anisotropic magnetoresistance due to the orbital rearrangement in a non-magnetic correlated metal. In particular, we measured the magnetoresistance under fields up to 31.4 T in the cubic Pr-based heavy fermion superconductor PrV2Al20 with a nonmagnetic Γ3 doublet ground state, exhibiting antiferro-quadrupole ordering below 0.7 K. For the [100] direction, we find that the high-field phase appears between 12 T and 25 T, accompanied by a large jump at 12 T in the magnetoresistance (∆M R ∼ 100 %) and in the anisotropic magnetoresistivity (AMR) ratio by ∼ 20 %. These observations indicate that the strong hybridization between the conduction electrons and anisotropic quadrupole moments leads to the Fermi surface reconstruction upon crossing the field-induced antiferro-quadrupole (orbital) rearrangement.

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Scalar Order in PrFe₄P₁₂ Studied by Thermal Expansion and Magnetostriction

Cited by 6 publications

References 25 publications

Growth of Single Crystal and Effects of Electron Doping in Filled Skutterudite Compound PrFe<sub>4</sub>P<sub>12</sub>

Growth of Single Crystal and Effects of Electron Doping in Filled Skutterudite Compound PrFe<sub>4</sub>P<sub>12</sub>

First-principles Theory of Magnetic Multipoles in Condensed Matter Systems

Giant Anisotropic Magnetoresistance due to Purely Orbital Rearrangement in the Quadrupolar Heavy Fermion Superconductor PrV2Al20

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