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Complex magneto structural behaviour of rare rich intermetallic Tb$_3$Co is reported in this study. Below the 84K (T$_N$), it undergoes a first order magnetic transition 72K confirmed from specific heat and magnetization measurements.…

材料科学 · 物理学 2019-08-23 Srikanta Goswami , P. D. Babu , R. Rawat

The ferromagnetic (FM) transition temperature (Tc) of a two-band Double-Exchange (DE) model for colossal magnetoresistance (CMR) materials is studied using dynamical mean-field theory (DMFT), in wide ranges of coupling constants, hopping…

其他凝聚态物理 · 物理学 2009-11-11 F. Popescu , C. Sen , E. Dagotto

Using Monte Carlo simulations and finite-size scaling, we investigate the XY antiferromagnet on the triangular, Union Jack and bisected-hexagonal lattices, and in each case find both Ising and Kosterlitz-Thouless transitions. As is…

强关联电子 · 物理学 2013-02-25 Jian-Ping Lv , Timothy M. Garoni , Youjin Deng

The Berezinskii-Kosterlitz-Thouless (BKT) transition in magnetic system is an intriguing phenomena and an accurate estimation of the BKT transition temperature has been a long-standing problem. In this work we explore the anisotropic…

强关联电子 · 物理学 2022-05-31 Sumit Haldar , Sk Saniur Rahaman , Manoranjan Kumar

Temperature dependence of the magnetocrystalline anisotropy energy and magnetization of the prototypical rare-earth magnet YCo$_5$ is calculated from first principles, utilizing the relativistic disordered local moment approach. We discuss…

材料科学 · 物理学 2014-09-17 Munehisa Matsumoto , Rudra Banerjee , Julie B. Staunton

We present a comprehensive study of the magnetocaloric effect (MCE) in the Nd$T_4$B system where $T$ = Fe, Co, and Ni. These compounds are ferromagnetic kagome materials with tunable ordering temperatures, transition width, and magnetic…

We report magnetization and specific heat measurements down to 2 K and electrical resistivity down to millikelvin temperatures on polycrystalline samples of the non-centrosymmetric compound Yb2Co12P7. In addition to the previously reported…

强关联电子 · 物理学 2015-06-03 J. J. Hamlin , M. Janoschek , R. E. Baumbach , B. D. White , M. B. Maple

We have successfully induced multiferroic behavior in the A-type antiferromagnet SmMnO3 by the substitution of Y at the Sm site. A magnetic transition develops at 24 K for Sm1-xYxMnO3 (x=0.4,0.5) which is not present in the parent compound.…

强关联电子 · 物理学 2011-05-17 D. O'Flynn , C. V. Tomy , M. R. Lees , A. Daoud-Aladine , G. Balakrishnan

Magnetic semiconductors may soon improve the energy efficiency of computers, but materials exhibiting these dual properties remain underexplored. Here, we report the computational prediction and realization of a new magnetic and…

Several rare earth magnetic pyrochlore materials are well modeled by a spin-1/2 quantum Hamiltonian with anisotropic exchange parameters Js. For the Er2Ti2O7 material, the Js were recently determined from high-field inelastic neutron…

强关联电子 · 物理学 2014-04-11 J. Oitmaa , R. R. P. Singh , A. G. R. Day , B. V. Bagheri , M. J. P. Gingras

Compositionally complex materials (CCMs) present a potential paradigm shift in the design of magnetic materials. These alloys exhibit long-range structural order coupled with limited or no chemical order. As a result, extreme local…

A complex magnetic order of the multiferroic compound Co3TeO6 has been revealed by neutron powder diffraction studies on ceramics and crushed single crystals. The compound adopts a monoclinic structure (s.g. C2/c) in the studied temperature…

Machine learning is becoming a powerful tool to predict temperature-dependent yield strengths (YS) of structural materials, particularly for multi-principal-element systems. However, successful machine-learning predictions depend on the use…

材料科学 · 物理学 2022-07-13 Baldur Steingrimsson , Xuesong Fan , Rui Feng , Peter K. Liaw

Here, we have studied the temperature dependent Seebeck coefficient (S) of the NaCo$_2$O$_4$ (NCO) by using experimental and computational methods. The range of experimentally obtained S is $\sim$55 to 103 $\mu$V/K in the temperature range…

材料科学 · 物理学 2025-05-06 Rahul Raj , Sudhir K. Pandey

Polycrystalline samples of Lu{1-x}Sc{x}MnSi (x= 0, 0.25, 0.50) are studied using powder x-ray diffraction (XRD), heat capacity Cp, magnetization M, magnetic susceptibility chi, and electrical resistivity rho measurements versus temperature…

强关联电子 · 物理学 2014-08-20 R. J. Goetsch , V. K. Anand , D. C. Johnston

The first order magneto-structural transition ($T_t\simeq95$ K) and magnetocaloric effect in MnNiGe$_{0.9}$Ga$_{0.1}$ are studied via powder x-ray diffraction and magnetization measurements. Temperature dependent x-ray diffraction…

材料科学 · 物理学 2018-01-17 Pallab Bag , R. Nath

We report the results of our investigation of magnetic, thermodynamic and dielectric properties of Ca substituted half-doped orthochromite, Dy0.6Ca0.4Fe0.5Cr0.5O3. Magnetic susceptibility and heat capacity data bring out that this compound…

材料科学 · 物理学 2017-03-29 Mohit K Sharma , Tathamay Basu , K Mukherjee , E V Sampathkumaran

Temperature-dependent in-plane, $\rho_a(T)$, and inter-plane, $\rho_c(T)$, resistivities were measured for the iron-arsenide superconductor (Ba$_{1-x}$K$_x$)Fe $_2$As$_2$ over a broad doping range from parent compound to optimal doping…

We report Electron Paramagnetic Resonance measurements on single crystalline and powder samples of Nd_0.5Ca_0.5MnO_3 across the charge-ordering transition at T_co=240 K down to the antiferromagnetic ordering transition at T_N = 140 K. The…

强关联电子 · 物理学 2021-05-26 Janhavi P. Joshi , Rajeev Gupta , A. K. Sood , S. V. Bhat , A. R. Raju , C. N. R. Rao

Experiments have been performed to measure magnetoelectric properties of room temperature spirally ordered Sr3Co2Fe24O41 hexaferrite slabs. The measured properties include the magnetic permeability, the magnetization and the strain all as a…

材料科学 · 物理学 2015-06-03 Khabat Ebnabbasi , Carmine Vittoria , Allan Widom