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Intriguing magnetic and electronic behaviors in La and Ru doped Sr2IrO4.
J Phys Condens Matter
December 2024
Departmet of Physics(MMV), Banaras Hindu University, Varanasi, Varanasi, Uttar Pradesh, 221005, INDIA.
We report a detailed experimental study of the structural, magnetic and electrical properties of La and Ru doped (Sr1-x Lax)2Ir1-xRuxO4 (x= 0.05, 0.15).
View Article and Find Full Text PDFEmergence of exotic electronic and magnetic phases upon electron filling in NaBO (B = Ta, Ir, Pt, and Tl): a first-principles study.
Phys Chem Chem Phys
June 2024
UGC-DAE Consortium for Scientific Research, D.A.V.V. campus, Khandwa Road, Indore 452001, Madhya Pradesh, India.
Competition between spin-orbit interaction and electron correlations can stabilize a variety of non-trivial electronic and magnetic ground states. Using density functional theory calculations, here we show that different exotic electronic and magnetic ground states can be obtained by electron filling of the B-site cation in the NaBO family of compounds (B = Ta, Ir, Pt and Tl). Electron filling leads to a Peierls insulator state with a direct band gap to = 1/2 spin-orbit assisted Mott-insulator to band insulator and then to negative charge-transfer half-metal transition.
View Article and Find Full Text PDFReentrant ferromagnetic ordering of the random-field Heisenberg model in d>2 dimensions: Fourier-Legendre renormalization-group theory.
Phys Rev E
January 2024
Faculty of Engineering and Natural Sciences, Kadir Has University, Cibali, Istanbul 34083, Turkey.
The random-magnetic-field classical Heisenberg model is solved in spatial dimensions d≥2 using the recently developed Fourier-Legendre renormalization-group theory for 4π steradians continuously orientable spins, with renormalization-group flows of 12 500 variables. The random-magnetic-field Heisenberg model is exactly solved in 10 hierarchical models, for d=2,2.26,2.
View Article and Find Full Text PDFObservation of Topological Hall Effect in a Chemically Complex Alloy.
Adv Mater
April 2024
Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
The topological Hall effect (THE) is the transport response of chiral spin textures and thus can serve as a powerful probe for detecting and understanding these unconventional magnetic orders. So far, the THE is only observed in either noncentrosymmetric systems where spin chirality is stabilized by Dzyaloshinskii-Moriya interactions, or triangular-lattice magnets with Ruderman-Kittel-Kasuya-Yosida-type interactions. Here, a pronounced THE is observed in a Fe-Co-Ni-Mn chemically complex alloy with a simple face-centered cubic (fcc) structure across a wide range of temperatures and magnetic fields.
View Article and Find Full Text PDFGrowth and martensitic transformation of ferromagnetic Co-Cr-Ga-Si epitaxial films.
Sci Technol Adv Mater
September 2023
Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Dresden, Germany.
During cooling, conventional martensitic transformation can only be realized from austenite to martensite. Recently, a so-called reentrant martensitic transformation attracted much interest due to an additional transformation from martensite to austenite during further cooling. Obviously, materials with this reentrant transformation will increase the number of physical effects and possible applications.
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