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High-resolution and high-flux neutron as well as X-ray powder-diffraction experiments were performed on the oxypnictide series LaO(1-x)FxFeAs with 0<x<0.15 in order to study the crystal and magnetic structure. The magnetic symmetry of the…

Superconductivity · Physics 2012-01-12 N. Qureshi , Y. Drees , J. Werner , S. Wurmehl , C. Hess , R. Klingeler , B. Buechner , M. T. Fernandez-Diaz , M. Braden

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…

The Fe electronic structure and magnetism in (i) monoclinic Ca$_2$FeReO$_6$ with a metal-insulator transition at $T_{MI} \sim 140$ K and (ii) quasi-cubic half-metallic Ba$_2$FeReO$_6$ ceramic double perovskites are probed by soft x-ray…

Strongly Correlated Electrons · Physics 2019-05-14 E. Granado , J. C. Cezar , C. Azimonte , J. Gopalakrishnan , K. Ramesha

The interplay between covalency and magnetism is non-trivial and can be harnessed for designing new functional magnetic materials. Based on a survey using density functional calculations, we show that $TM\unicode{x2013}O$ bond covalency can…

Materials Science · Physics 2020-04-24 M. H. N. Assadi , H. Katayama-Yoshida

Nanoparticles (NPs) which combine several magnetic phases offer wide perspectives for cutting edge applications because of the high modularity of their magnetic properties. Besides the addition of the magnetic characteristics intrinsic to…

Neutron powder diffraction measurements have been performed on Ce_xNd_{1-x}B_6 (x = 0.5, 0.6, 0.7, and 0.8) solid solutions to determine the type of magnetic order occurring in these compounds as a result of the interplay between magnetic…

Strongly Correlated Electrons · Physics 2016-11-25 Jean-Michel Mignot , Julien Robert , Gilles André , Masafumi Sera , Fumitoshi Iga

Nanostructured Pd-Fe thin films with varied Fe content were prepared by electrodeposition technique from organic electrolytes on Cu and brass substrates. The structure and the magnetic properties of the films were investigated prior to…

The magnetic H - T phase diagram of a quasi-two-dimensional antiferromagnet RbFe(MoO4)2 with an equilateral triangular lattice structure is studied with 87Rb NMR and neutron diffraction techniques. This combination of experimental…

Strongly Correlated Electrons · Physics 2022-02-09 Yu. A. Sakhratov , O. Prokhnenko , A. Ya. Shapiro , H. D. Zhou , L. E. Svistov , A. P. Reyes , O. A. Petrenko

Composite materials based on Poly(3,4-ethylenedioxythiophene) (PEDOT) and CoFe$_2$O$_4$ magnetic nanoparticles (NP) were synthesized by chemical oxidative polymerization with varying monomer and surfactant (DBSA) concentrations, and were…

Materials Science · Physics 2025-07-11 Gabriel Paciaroni , María Ana Castro , Carlos Acha , Paula Soledad Antonel

Cobalt nitride (Co-N) thin films prepared using a reactive magnetron sputtering process by varying the relative nitrogen gas flow (\pn) are studied in this work. As \pn~increases, Co(N), \tcn, Co$_3$N and CoN phases are formed. An…

Materials Science · Physics 2015-06-01 Rachana Gupta , Nidhi Pandey , Akhil Tayal , Mukul Gupta

A strong electronic reconstruction resulting in a quenching of the Fe magnetic moments has recently been predicted to be at the origin of the giant magnetocaloric effect displayed by Fe2Pbased materials. To verify this scenario, X-ray…

Materials Science · Physics 2015-02-02 H. Yibole , F. Guillou , L. Caron , E. Jiménez , F. M. F. de Groot , P. Roy , R. de Groot , N. H. van Dijk , E. Brück

We report on the magnetic and Mossbauer properties of polycrystalline HoFe1-xCrxO3 compounds. Magnetization data reveals the continuous tailoring of magnetic transition due to weakening of Ho3+ Fe3+ and Fe3+ Fe3+ interactions in the entire…

Materials Science · Physics 2017-03-08 Ganesh Kotnana , V. Raghavendra Reddy , S. Narayana Jammalamadaka

Despite a clear demonstration of bistability in spin-crossover (SCO) materials, the absence of long-range magnetic order and poor electrical conductivity limit their prospect in spintronic and nanoelectronic applications. Intending to…

Magnetism in the orthorhombic metal CaFe$_4$As$_3$ was examined through neutron diffraction for powder and single crystalline samples. Incommensurate (${\bm q}_{\rm m}\approx (0.37-0.39)\times{\bm b}^{\ast}$) and predominantly…

We report the magnetic properties of magnetic nano-composite, consisting of different quantity of NiFe2O4 nanoparticles in polymer matrix. The nanoparticles exhibited a typical magnetization blocking, which is sensitive on the variation of…

Materials Science · Physics 2015-05-13 A. Poddar , R. N. Bhowmik , Amitabha De , Pintu Sen

BiFe1-xCrxO3 (x=0.0, 0.05 and 0.1) nanoparticles are prepared by a combustion method without using any solvent. All the synthesized nanoparticles are single phase in nature, nearly spherical in shape and crystallize in distorted perovskite…

Materials Science · Physics 2015-02-23 Samar Layek , Santanu Saha , H. C. Verma

The magnetic moments and magnetic anisotropy energy (MAE) of CoRh alloy nanoparticles are determined experimentally and theoretically. Non-trivial correlations between chemical order, magnetic order and MAE are revealed. A remarkable…

Materials Science · Physics 2015-05-13 M. Muñoz-Navia , J. Dorantes-Dávila , D. Zitoun , C. Amiens , N. Jaouen , A. Rogalev , M. Respaud , G. M. Pastor

The structural distortion and magnetoelastic coupling induced through commensurate magnetism has been investigated by neutron diffraction in structurally related MnWO$_4$ and NaFe(WO$_4$)$_2$. Both systems exhibit a competition of…

Strongly Correlated Electrons · Physics 2020-10-28 S. Biesenkamp , N. Qureshi , Y. Sidis , P. Becker , L. Bohatý , M. Braden

The synthesis of aluminum substituted strontium hexaferrite nanoparticles (SrFe12-xAlxO19 with x = 0-3), via three different preparation methods, is investigated. The synthesis methods are hydrothermal autoclave (AC) synthesis, a citrate…

In order to unambiguously identify the source of magnetism reported in recent studies of the Co-Te system, two sets of high-quality, epitaxial CoTe$_x$ films (thickness $\simeq$ 300 nm) were prepared by pulse laser deposition (PLD). X-ray…

Materials Science · Physics 2024-07-23 Zhiwei Zhang , William A. Hines , J. I. Budnick , David M. Perry , B. O. Wells
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