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We study correlation effects and temperature dependencies in the electronic structure of thin ferromagnetic local-moment films. In a first step the Kondo-lattice model is investigated as a candidate for a proper representation of…

Strongly Correlated Electrons · Physics 2015-06-24 W. Nolting , C. Santos

Magnetism, when combined with an unconventional electronic band structure, can give rise to forefront electronic properties such as the quantum anomalous Hall effect, axion electrodynamics, and Majorana fermions. Here we report the…

We present the study of magnetic and transport properties of Pb(1-x-y-z)Mn(x)Sn(y)Eu(z)Te. AC magnetic susceptibility measurements as well as transport characterization were performed. The obtained results indicate that the presence of two…

We estimate, using high-temperature series expansions, the transition temperatures of the spin 1/2, 1 and 3/2 Heisenberg ferromagnet and antiferromagnet in 3-dimensions. The manner in which the difference between Curie and Neel temperatures…

Superconductivity · Physics 2009-11-10 J. Oitmaa , Weihong Zheng

We report on a comprehensive combined experimental and theoretical study of Curie temperature trends in (Ga,Mn)As ferromagnetic semiconductors. Broad agreement between theoretical expectations and measured data allows us to conclude that…

Superconductivity in the heavy-fermion compound CeCu2Si2 is a prototypical example of Cooper pairs formed by strongly correlated electrons. For more than 30 years, it has been believed to arise from nodal d-wave pairing mediated by a…

We study the interatomic exchange interactions and Curie temperatures in half-metallic semi Heusler compounds NiCrZ (Z=P, Se, Te) and NiVAs. The study is performed within the framework of density functional theory. The calculation of…

Materials Science · Physics 2015-06-25 E. Sasioglu , L. M. Sandratskii , P. Bruno

The magnetic behaviour of SmN has been investigated in stoichiometric polycrystalline films. All samples show ferromagnetic order with Curie temperature (T_c) of 27 +/- 3 K, evidenced by the occurrence of hysteresis below T_c. The…

Strongly Correlated Electrons · Physics 2009-11-13 C. Meyer , B. J. Ruck , J. Zhong , S. Granville , A. R. H. Preston , G. V. M. Williams , H. J. Trodahl

Recent realizations of intrinsic magnetic order in truly two-dimensional materials have opened new avenues in the fundamental knowledge and spintronic applications. Here we develop an anisotropic Heisenberg model with relativistic exchange…

Materials Science · Physics 2021-07-27 Chandan K. Singh , Mukul Kabir

The remarkable and fascinating properties of two-dimensional materials have raised them to the rank of most promising candidates for technological applications. In particular, the possibility of long-range ferromagnetic order in 2D…

Strongly Correlated Electrons · Physics 2023-06-14 G. Bouzerar

It is of great interest to explore intrinsic two-dimensional ferromagnetism and seek better two-dimensional quantum anomalous Hall insulator materials. Here, we show that the FeBr$_3$ monolayer is an intrinsic two-dimensional ferromagnetic…

Mesoscale and Nanoscale Physics · Physics 2017-07-10 Shi-Hao Zhang , Bang-Gui Liu

Exploring two-dimensional (2D) magnetic semiconductors with room temperature magnetic ordering and electrically controllable spin polarization is a highly desirable but challenging task for nanospintronics. Here, through first principles…

Materials Science · Physics 2022-08-16 Xiangyang Li , Haifeng Lv , Xiaofeng Liu , Xiaojun Wu , Xingxing Li , Jinlong Yang

The close-packed AB$_2$ structures called Laves phases constitute the largest group of intermetallic compounds. In this paper we computationally investigated the pseudo-binary Laves phase system Y$_{1-x}$Gd$_x$(Fe$_{1-y}$Co$_y$)$_2$…

Materials Science · Physics 2021-10-13 Bartosz Wasilewski , Mirosław Werwiński

We report the structural, magnetic and transport properties of polycrystalline CrVTiAl alloy along with first principles calculations. It crystallizes in the LiMgPdSn type structure with lattice parameter 6.14 \AA\ at room temperature.…

The Curie temperature TC is investigated as a function of the hole concentration p in thin films of ferromagnetic semiconductor (Ga,Mn)As. The magnetic properties are probed by transport measurements and p is varied by the application of an…

Materials Science · Physics 2015-05-18 Y. Nishitani , D. Chiba , M. Endo , M. Sawicki , F. Matsukura , T. Dietl , H. Ohno

Using high-resolution angle-resolved photoemission spectroscopy (ARPES) and ab-initio calculation, we systematically investigate the electronic structure of the chiral helimagnet Cr1/3NbS2 and its temperature evolution. The comparison with…

Room temperature ferromagnetism has been one of the most sought after topics in today's emerging field of spintronics. It is strongly believed that defect- and inhomogeneity- free sample growth should be the optimal route for achieving…

Materials Science · Physics 2012-01-24 Akash Chakraborty , Richard Bouzerar , Stefan Kettemann , Georges Bouzerar

Spin semimetals are a recently discovered new class of spintronic materials, which exhibit a band gap in one spin channel while a semimetallic feature in the other and thus allows for tunable spin transport. Here, we present experimental…

Two-dimensional (2D) semiconductors integrated with two or more functions are the cornerstone for constructing multifunctional nanodevices, but remain largely limited. Here, by tuning the spin state of organic linkers and the…

Materials Science · Physics 2022-08-16 Xiangyang Li , Qing-Bo Liu , Yongsen Tang , Wei Li , Ning Ding , Zhao Liu , Hua-Hua Fu , Shu-ai Dong , Xingxing Li , Jinlong Yang

Molecular ferroelectrics have captured immense attention due to their superiority over inorganic oxide ferroelectrics, such as environmentally friendly, low-cost, flexible, foldable. However, the mechanisms of ferroelectric switching and…

Chemical Physics · Physics 2021-06-18 Xiaoqing Zhu , Wenbin Fan , Wei Ren , Yongle Li