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Magnetic dc susceptibility between 1.5 and 800 K, ac susceptibility and magnetization, thermodynamic properties, temperature dependence of radio and audio-wave dielectric constants and conductivity, contact-free dielectric constants at…

Materials Science · Physics 2010-07-22 Jun Lu , A. Günther , F. Schrettle , F. Mayr , S. Krohns , P. Lunkenheimer , A. Pimenov , V. D. Travkin , A. A. Mukhin , A. Loidl

Using analytical and path integral Monte Carlo methods, we study the susceptibility $\chi_{dc}(T)$ of a spin-S impurity with XY rotational symmetry embedded in a metal. Close to a ferromagnetic quantum critical point, the impurity polarizes…

Strongly Correlated Electrons · Physics 2007-05-23 Y. L. Loh , V. Tripathi , M. Turlakov

An AC susceptometer operating in the range of 10 Hz to 100 kHz and at room temperature is designed, built, calibrated and used to characterize the magnetic behaviour of coated magnetic nanoparticles. Other weakly magnetic materials (in…

Instrumentation and Detectors · Physics 2013-12-18 M. Alderighi , G. Bevilacqua , V. Biancalana , Y. Dancheva , A. Khanbekyan , L. Moi

Recently discovered 2D van der Waals magnetic materials, and specifically Iron-Germanium-Telluride ($\rm Fe_{5}GeTe_{2}$), have attracted significant attention both from a fundamental perspective and for potential applications. Key open…

We report the design and performance of a non-magnetic drift stable optically pumped cesium magnetometer with a measured sensitivity of 35 fT at 200 s integration time and stability below 50 fT between 70 s and 600 s. To our knowledge this…

Applied Physics · Physics 2022-05-04 M. Rosner , D. Beck , P. Fierlinger , H. Filter , C. Klau , F. Kuchler , P. Rößner , M. Sturm , D. Wurm , Z. Sun

The interaction between two different materials can present novel phenomena that are quite different from the physical properties observed when each material stands alone. Strong electronic correlations, such as magnetism and…

Dispersion of tubules made of diacetylenic phospholipids (DC 8,9 PC), in aqueous colloidal dispersions of magnetic nanoparticles is studied as a function of the sign of particles surface charges. In every case the tubule-vesicle transition…

Soft Condensed Matter · Physics 2019-10-14 Damien Letellier , Olivier Sandre , Christine Ménager , Valérie Cabuil , Michel Lavergne

The Casimir pressure is investigated in three-layer systems where the intervening stratum possesses magnetic properties. This subject is gaining in importance in connection with ferrofluids and their use in various microelectromechanical…

Mesoscale and Nanoscale Physics · Physics 2019-02-12 G. L. Klimchitskaya , V. M. Mostepanenko , E. K. Nepomnyashchaya , E. N. Velichko

We present magnetic susceptibility, heat capacity, and neutron diffraction measurements of polycrystalline Nd2Ru2O7 down to 0.4 K. Three anomalies in the magnetic susceptibility measurements at 146, 21 and 1.8 K are associated with an…

Strongly Correlated Electrons · Physics 2018-07-31 S. T. Ku , Dinesh Kumar , M. R. Lees , W-T. Lee , R. Aldus , A. Studer , P. Imperia , S. Asai , T. Masuda , S. W. Chen , J. M. Chen , L. J. Chang

Wireless electromagnetic sensing is a passive, non-destructive technique for measuring physical and chemical changes through permittivity or conductivity changes. However, the readout is limited by the sensitivity of the materials, often…

Systems and Control · Electrical Eng. & Systems 2024-09-06 Benjamin King , Nikolas Bruce , Mahmoud Wagih

In this paper we report successful synthesis and magnetic properties of (Ca,Na)(Zn,Mn)2Sb2 as a new ferromagnetic dilute magnetic semiconductor (DMS). In this DMS material the concentration of magnetic moments can be controlled…

The authors present a quantity termed charge-spin susceptibility, which measures the charge response to spin degrees of freedom in strongly correlated materials. This quantity is simple to evaluate using both standard density functional…

Superconductivity · Physics 2021-02-23 J. N. B. Rodrigues , Lucas K. Wagner

We consider electronic and magnetic properties of chromium, a well-known itinerant antiferromagnet, by a combination of density functional theory (DFT) and dynamical mean-field theory (DMFT). We find that electronic correlation effects in…

Strongly Correlated Electrons · Physics 2021-08-18 A. S. Belozerov , A. A. Katanin , V. I. Anisimov

Nano- and micromagnetic materials have been extensively employed in micro-functional devices. However, measuring small-scale mechanical and magnetomechanical properties is challenging, which restricts the design of new products and the…

Materials Science · Physics 2014-04-04 Hao Zhou , Yongmao Pei , Daining Fang

Diluted magnetic semiconductors (DMS) are interesting because of the interplay between the electronic and magnetic subsystems. We describe selected magnetic properties of IV-VI diluted magnetic semiconductors, looking at the similarities…

Materials Science · Physics 2023-08-04 M. Górska , Ł. Kilański , A. Łusakowski

We demonstrate that parity nonconserving interaction due to the nuclear weak charge Q_W leads to nonlinear magnetoelectric effect in centrosymmetric paramagnetic crystals. It is shown that the effect exists only in crystals with special…

Other Condensed Matter · Physics 2009-11-11 T. N. Mukhamedjanov , O. P. Sushkov

We have investigated the magnetic properties of carbon powders which consist of nanodisks, nanocones, and a small fraction of carbon-black particles. Magnetization measurements were carried out using a superconducting quantum interference…

Mesoscale and Nanoscale Physics · Physics 2015-06-04 Jozef Cernak , Geir Helgesen , Jozef Kovac , Arne T. Skjeltorp , Josef Voltr

We present the fabrication of metallic magnetic nanowires using a low temperature chemical process. We show that pressed powders and magnetically oriented samples exhibit a very high coercivity (6.5 kOe at 140 K and 4.8 kOe at 300 K). We…

Materials Science · Physics 2007-11-14 T. Maurer , F. Ott , G. Chaboussant , Y. Soumare , J. -Y. Piquemal , G. Viau

Magnetic skyrmions are topological objects, which have recently been observed in thin films at room temperature. Sub 100-nm sizes and spin polarised current manipulation make them candidates for high density information storage and…

Mesoscale and Nanoscale Physics · Physics 2021-07-05 Laurent Ranno , Maria Alfonso Moro

Rare earth based intermetallics, SmScGe and NdScGe, are shown to exhibit near zero net magnetization with substitutions of 6 to 9 atomic percent of Nd and 25 atomic percent of Gd, respectively. The notion of magnetic compensation in them is…

Strongly Correlated Electrons · Physics 2010-09-28 Prasanna D. Kulkarni , U. V. Vaidya , S. K. Dhar , P. Manfrinetti , A. K. Grover