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Experimental results on the metal-insulator transition and related phenomena in strongly interacting two-dimensional electron systems are discussed. Special attention is given to recent results for the strongly enhanced spin susceptibility,…

Strongly Correlated Electrons · Physics 2016-11-18 A. A. Shashkin , S. V. Kravchenko

We have studied the problem of phase stability in NiPt alloy system. We have used the augmented space recursion based on the TB-LMTO as the method for studying the electronic structure of the alloys. In particular, we have used the…

Materials Science · Physics 2009-11-07 Durga Paudyal , Tanusri Saha-Dasgupta , Abhijit Mookerjee

Experimental results on the metal-insulator transitions and the anomalous properties of strongly interacting two-dimensional electron systems are reviewed and critically analyzed. Special attention is given to recent results for the…

Strongly Correlated Electrons · Physics 2009-09-29 A. A. Shashkin

Ab initio linear-response calculations are reported of the phonon spectra and the electron-phonon interaction for several transition metal carbides and nitrides in a NaCl-type structure. For NbC, the kinetic, optical, and superconducting…

Superconductivity · Physics 2009-11-11 E. G. Maksimov , S. V. Ebert , M. V. Magnitskaya , A. E. Karakozov , S. Yu. Savrasov

We use a combination of the coherent potential approximation and dynamical mean field theory to study magnetic properties of the Fe$_{1-x}$Ni$_x$ alloy from a first principles. Calculated uniform magnetic susceptibilities have a…

Strongly Correlated Electrons · Physics 2016-05-24 Alexander I. Poteryaev , Nikolay A. Skorikov , Vladimir I. Anisimov , Michael A. Korotin

This article presents a phenomenological dynamic phase transition theory for ferromagnetism, leading to a precise description of the dynamic transitions, and to a physical predication on the spontaneous magnetization. The analysis also…

Materials Science · Physics 2008-05-07 Tian Ma , Shouhong Wang

We show that the differences in the magnetic properties of Ni-Pd and Ni-Pt alloys arise mainly due to relativity. In particular, we find that the local magnetic moment of Ni increases with the addition of Pd in Ni-Pd while it decreases with…

Materials Science · Physics 2009-11-07 Prabhakar P. Singh

We report a detail theoretical study of the electronic structure and phase stability of transition metal oxides MnO, FeO, CoO, and NiO in their paramagnetic cubic B1 structure by employing dynamical mean-field theory of correlated electrons…

Strongly Correlated Electrons · Physics 2016-10-26 I. Leonov , L. Pourovskii , A. Georges , I. A. Abrikosov

Alloys with a first-order magnetic transition are central to solid-state refrigeration technology, sensors and actuators, or spintronic devices. The discontinuous nature of the transition in these materials is a consequence of the coupling…

Transition metal phosphorous trichalcogenides, $M{\rm P}X_3$ ($M$ and $X$ being transition metal and chalcogen elements respectively), have been the focus of substantial interest recently because of their possible magnetism in the…

Strongly Correlated Electrons · Physics 2019-12-05 Heung-Sik Kim , David Vanderbilt , Kristjan Haule

The electronic transport properties and the magnetic susceptibility were measured in detail in $YBaCo_2O_{5.45}$. Close to the so-called metal-insulator transition, strong effects of resistance relaxation, a clear thermal hysteresis and a…

Materials Science · Physics 2009-11-13 A. Pautrat , P. Boullay , S. Hebert , V. Caignaert

The structure and static magnetic properties - saturation magnetization, perpendicular anisotropy, spectroscopic g-factor, and orbital magnetization - of thin-film 3d transition metal alloys are determined over the full range of alloy…

We report magnetization and differential thermal analysis measurements as a function of pressure accross the martensitic transition in magnetically superelastic Ni-Mn-In alloys. It is found that the properties of the martensitic…

The thermoelectric power (TEP) measurements have been carried out to investigate the changes in the electronic structure associated with the intermartensitic and martensitic transitions in Ni$_{2+x}$Mn$_{1-x}$Ga (0 $\le$ x $\le$ 0.19). The…

Materials Science · Physics 2009-11-11 P. A. Bhobe , J. H. Monteiro , J. C. Cascalheira , S. K. Mendiratta , K. R. Priolkar , P. R. Sarode

The magnetic properties of the transition metal monoxides MnO and NiO are investigated at equilibrium and under pressure via several advanced first-principles methods coupled with Heisenberg Hamiltonian MonteCarlo. The comparative…

Strongly Correlated Electrons · Physics 2015-05-28 T. Archer , C. D. Pemmaraju , S. Sanvito , C. Franchini , J. He , A. Filippetti , P. Delugas , D. Puggioni , V. Fiorentini , R. Tiwari , P. Majumdar

The magnetic and thermodynamic properties of a Ni2.19Mn0.81Ga alloy with coupled magnetic and structural (martensitic) phase transitions were studied experimentally and theoretically. The magnetocaloric effect was measured by a direct…

Materials Science · Physics 2009-11-10 A. Aliev , A. Batdalov , S. Bosko , V. Buchelnikov , I. Dikshtein , V. Khovailo , V. Koledov , R. Levitin , V. Shavrov , T. Takagi

Recent thermodynamic measurements on two-dimensional (2D) electron systems have found diverging behavior in the magnetic susceptibility and appearance of ferromagnetism with decreasing electron density. The critical densities for these…

Strongly Correlated Electrons · Physics 2007-05-23 S. M. Fazeli , K. Esfarjani , B. Tanatar

Fe$_2$P alloys have been identified as promising candidates for magnetic refrigeration at room-temperature and for custom magnetostatic applications. The intent of this study is to accurately characterize the magnetic ground state of the…

A well-known connection between the magnetic susceptibility and the effective exchange parameter is analyzed. It is shown that all current computational schemes use a long-wave approximation which is suitable only for localized moments…

Strongly Correlated Electrons · Physics 2009-11-07 V. P. Antropov

We studied the magnetic and transport properties of Co nanoparticles (NPs) being capped with varying amounts of Pt. Beside field and temperature dependent magnetization measurements we performed delta-M measurements to study the magnetic…

Materials Science · Physics 2013-02-06 A. Ludwig , L. Agudo , G. Eggeler , A. Ludwig , A. D. Wieck , O. Petracic
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