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There are two silver perovskite oxides: AgNbO3 and AgTaO3. AgNbO3 has a noncentrosymmetric group of Pmc21 at room temperature with a ferri-electric ordering of polarization. Such a ferri-electric state with small polarization can be changed…

Materials Science · Physics 2011-08-31 Desheng Fu , Mitsuru Itoh

The study of the ordered oxygen deficient perovskite EuBaCo2-xNixO5.50 shows that the doping of cobalt sites by nickel induces a strong ferromagnetic component at low temperature in the antiferromagnetic matrix of EuBaCo2O5.50. This system…

Materials Science · Physics 2009-11-11 B. Raveau , Ch. Simon , V. Caignaert , V. Pralong , F. X. Lefevre

The rapidly developing field of ferromagnetism in diluted magnetic semiconductors, where a semiconductor host is magnetically doped by transition metal impurities to produce a ferromagnetic semiconductor (e.g. Ga_{1-x}Mn_xAs with x ~ 1-10…

Materials Science · Physics 2009-11-10 S. Das Sarma , E. H. Hwang , A. Kaminski

he structural, transport, magnetic and optical properties of the double perovskite $A_2$CrWO$_6$ with $A=\text{Sr, Ba, Ca}$ have been studied. By varying the alkaline earth ion on the $A$ site, the influence of steric effects on the Curie…

Strongly Correlated Electrons · Physics 2009-11-10 J. B. Philipp , P. Majewski , L. Alff , A. Erb , R. Gross , T. Graf , M. S. Brandt , J. Simon , T. Walther , W. Mader , D. Topwal , D. D. Sarma

We introduce a simple but powerful zero temperature Stoner model to explain the unusual phase diagram of the ferromagnetic superconductor, UGe2. Triplet superconductivity is driven in the ferromagnetic phase by tuning the majority spin…

Strongly Correlated Electrons · Physics 2009-11-07 K. G. Sandeman , G. G. Lonzarich , A. J. Schofield

We report the discovery of a new diluted magnetic semiconductor, Li(Zn,Mn)P, in which charge and spin are introduced independently via lithium off-stoichiometry and the isovalent substitution of Mn2+ for Zn2+, respectively. Isostructural to…

Structural and magnetic properties of the doped terbium manganites (Tb,A)MnO3 (A = Gd, Dy and Ho) have been investigated using first-principles calculations and further confirmed by subse- quent experimental studies. Both computational and…

Materials Science · Physics 2015-07-14 Vinit Sharma , A. McDannald , M. Staruch , R. Ramprasad , M. Jain

It is essential to explore two-dimensional (2D) material with magnetic ordering in new generation spintronic devices. Particularly, the seeking of room-temperature 2D ferromagnetic (FM) materials is a hot topic of current research. Here, we…

Mesoscale and Nanoscale Physics · Physics 2018-09-07 Chang-Wei Wu , Jun-Han Huang , Dao-Xin Yao

Understanding lattice dynamics and structural transitions in vacancy-ordered double perovskites is crucial for developing lead-free optoelectronic materials, yet the role of dopants in modulatingthese properties remains poorly understood.…

Interlayer coupling is of vital importance for manipulating physical properties, e.g. electronic bandgap, in two-dimensional materials. However, tuning magnetic proper-ties in these materials is yet to be addressed. Here, we found a striped…

Materials Science · Physics 2018-06-20 Cong Wang , Xieyu Zhou , Yuhao Pan , Jingsi Qiao , Xianghua Kong , Chao-Cheng Kaun , Wei Ji

Using density functional theory (DFT)-based calculations, we propose a family of metastable, as-yet unmade V5+ and Cr6+ double perovskite compounds with low band gaps spanning much of the visible region of the solar spectrum. Through…

Materials Science · Physics 2012-11-07 Robert F. Berger , Jeffrey B. Neaton

The structural, electronic, magnetic and ferroelectric properties of Pb free double perovskite multiferroic Bi2FeTiO6 are investigated using density functional theory within the general gradient approximation (GGA) method. Our structural…

Materials Science · Physics 2018-05-23 Lokanath Patra , P. Ravindran

The Iridium-based oxides are the subject of great recent interest due to the non-conventional physics that may emerge from the strong spin-orbit coupling present in 5d ions. Here, we explore the coupling between Ir and Co in the…

Materials Science · Physics 2025-11-18 C. A. S. Vieira , B. J. Santos , J. G. Duque , E. M. Bittar , L. Bufaiçal

By density functional theory calculations, we predict a stable two-dimensional (2D) ferromagnetic semiconductor Cr$_2$Ge$_2$Se$_6$, where the Curie temperature $T$$_c$ can be dramatically enhanced beyond room temperature by applying a few…

Materials Science · Physics 2019-07-17 Xue-Juan Dong , Jing-Yang You , Bo Gu , Gang Su

Magnetic double perovskite compounds provide a fertile playground to explore interesting electronic and magnetic properties. By complementary macroscopic characterizations, neutron powder diffraction measurements and first-principles…

Strongly Correlated Electrons · Physics 2024-04-03 Cheng Su , Xu-Tao Zeng , Kaitong Sun , Denis Sheptyakov , Ziyu Chen , Xian-Lei Sheng , Haifeng Li , Wentao Jin

Ferromagnetism and accompanying large negative magnetoresistance in Pb-substituted Bi-Sr-Co-O misfit-layer compound are investigated in detail. Recent structural analysis of (Bi,Pb)${}_2$Sr${}_{3}$Co${}_2$O${}_9$, which has been believed to…

Strongly Correlated Electrons · Physics 2009-10-31 I. Tsukada , T. Yamamoto , M. Takagi , T. Tsubone , S. Konno , K. Uchinokura

Dilute magnetic semiconductors, achieved through substitutional doping of spin-polarized transition metals into semiconducting systems, enable experimental modulation of spin dynamics in ways that hold great promise for novel…

Magnetic interfaces and the phenomena arising from them drive both the design of modern spintronics and fundamental research. Recently, it was revealed that through designing magnetic frustration in configurationally complex entropy…

The La$_2$CoIr$_{1-x}$Ti$_x$O$_6$ double perovskite series serves as an effective platform for investigating the evolution of magnetic and electronic properties as a function of chemical pressure (doping) or hydrostatic pressure due to the…

Despite the great technological and scientific importance, a well-controlled coupled behavior in magnetoelectric multiferroic materials at room temperature remains challenging. We demonstrate that the self-ordered A2BBO6 (e.g., A = La, B =…

Materials Science · Physics 2015-05-14 M. P. Singh , K. D. Truong , S. Jandl , P. Fournier