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Precision sensing, and in particular high precision magnetometry, is a central goal of research into quantum technologies. For magnetometers, often trade-offs exist between sensitivity, spatial resolution, and frequency range. The…

Quantum Physics · Physics 2016-06-22 I. Baumgart , J. -M. Cai , A. Retzker , M. B. Plenio , Ch. Wunderlich

Elastoresistance describes the relative change of a material's resistance when strained. It has two major contributions: strain induced geometric and electronic changes. If the geometric factor dominates, like in ordinary metals such as…

Materials Science · Physics 2020-01-14 Na Hyun Jo , Lin-Lin Wang , Peter P. Orth , Sergey L. Bud'ko , Paul C. Canfield

We report the discovery of a novel giant magnetoresistance (GMR) phenomenon in a family of BaMn$_{2}$Pn$_{2}$ antiferromagnets (Pn stands for P, As, Sb, and Bi) with a parity-time symmetry. The resistivities of these materials are reduced…

Low-temperature properties of a crystal containing superconducting inclusions of two different materials have been studied. In the approximation that the size of inclusions is much smaller than the coherence length/penetration depth of the…

Superconductivity · Physics 2014-05-22 Oksana N. Shevtsova

We performed a systematic analysis of the tunneling magnetoresistance (TMR) effect in single grain boundary junctions formed in epitaxial La(2/3)Ca(1/3)MnO(3) films deposited on SrTiO(3) bicrystals. For magnetic fields H applied parallel to…

Strongly Correlated Electrons · Physics 2009-10-31 J. B. Philipp , C. Hoefener , S. Thienhaus , J. Klein , L. Alff , R. Gross

Magnetism is very important in science and technology, from magnetic recording to energy generation to trapping cold atoms. Physicists have managed to master magnetism - to create and manipulate magnetic fields- almost at will.…

Superconductivity · Physics 2015-05-28 Alvaro Sanchez , Carles Navau , Jordi Prat , Du-Xing Chen

The one- and two-orbital double-exchange models for manganites are studied using Monte Carlo computational techniques in the presence of a robust electron-phonon coupling (but neglecting the antiferromagnetic exchange $J_{\rm AF}$ between…

Strongly Correlated Electrons · Physics 2007-05-23 C. Şen , G. Alvarez , H. Aliaga , E. Dagotto

Many 'interesting; correlated electron materials exhibit an unusual sensitivity of measured properties to external perturbations, and in particular to imperfections in the sample being measured. It is argued that in addition to its…

Strongly Correlated Electrons · Physics 2009-11-10 A. J. Millis

Using density functional theory calculations, we demonstrate that the effect of anisotropic magnetoresistance (AMR) can be enhanced by orders of magnitude with respect to conventional bulk ferromagnets in junctions containing molecules…

Mesoscale and Nanoscale Physics · Physics 2015-12-23 Fabian Otte , Stefan Heinze , Yuriy Mokrousov

Magnetic refrigeration based on the magnetocaloric effect (MCE) of materials is a potential technique that has prominet advantages over the currently used gas compression-expansion technique in the sense of its high efficiency and…

Materials Science · Physics 2023-10-18 B. G. Shen , J. R. Sun , F. X. Hu , H. W. Zhang , Z. H. Cheng

In this letter we report a direct observation of a magnetic proximity effect in an amorphous thin film exchange-spring magnet by the use of neutron reflectometry. The exchange-spring magnet is a trilayer consisting of two ferromagnetic…

Materials Science · Physics 2020-10-14 A. J. Qviller , F. Magnus , B. J. Kirby , B. Hjörvarsson , C. Frommen , B. C. Hauback

Layered topologically non-trivial and trivial semimetals with AFM-type ordering of magnetic sublattice are known to exhibit a negative magnetoresistance that is well correlated with AFM magnetization changes in a magnetic field. This effect…

Mesoscale and Nanoscale Physics · Physics 2024-05-29 P. D. Grigoriev , N. S. Pavlov , I. A. Nekrasov , I. R. Shein , A. V. Sadakov , O. A. Sobolevskiy , E. Maltsev , N. Perez , L. Veyrat , V. M. Pudalov

The local magnetic field in a Penning-Malmberg trap is found by measuring the temperatures that result when electron plasmas are illuminated by microwaves pulses. Multiple heating resonances are observed as the pulse frequencies are swept.…

Plasma Physics · Physics 2020-03-18 E. D. Hunter , A. Christensen , J. Fajans , T. Friesen , E. Kur , J. S. Wurtele

The study of the manganese oxides, widely known as manganites, that exhibit the ``Colossal'' Magnetoresistance (CMR) effect is among the main areas of research within the area of Strongly Correlated Electrons. After considerable theoretical…

Strongly Correlated Electrons · Physics 2009-10-31 Elbio Dagotto , Takashi Hotta , Adriana Moreo

In strange metals, a strong and anomalous scattering effect exists and increases linearly with temperature. In FeSe, we observed that the temperature dependence of resistivity exhibits non-Fermi liquid behavior in two regions below and…

Superconductivity · Physics 2025-03-20 Xinyue Wang , Yue Sun , Wei Wei , Qiang Hou , Nan Zhou , Yufeng Zhang , Zhixiang Shi

We propose a new mechanism of negative magnetoresistance in non-magnetic granular materials in which electron transport is dominated by hopping between two nearest-neighbor clusters. We study the dependence of magnetoresistance on…

Condensed Matter · Physics 2009-10-31 X. R. Wang , S. C. Ma , X. C. Xie

The discovery of non-magnetic extreme magnetoresistance (XMR) materials has induced great interests because the XMR phenomenon challenges our understanding of how a magnetic field can alter electron transport in semimetals. Among XMR…

Materials Science · Physics 2016-08-09 Shanshan Sun , Qi Wang , Peng-Jie Guo , Kai Liu , Hechang Lei

Nano/micro-scale mechanical properties of multiferroic materials can be controlled by the external magnetic or electric field due to the coupling interaction. For the first time, a modularized multi-field nanoindentation apparatus for…

Instrumentation and Detectors · Physics 2013-06-25 Hao Zhou , Yongmao Pei , Hu Huang , Hongwei Zhao , Faxin Li , Daining Fang

Large magnetoresistive materials are of immense interest for a number of spintronic applications by developing high density magnetic memory devices, magnetic sensors and magnetic switches. Colossal magnetoresistance, for which resistivity…

Materials Science · Physics 2018-06-22 Sanjib Banik , Kalipada Das , Tapas Paramanik , N. P. Lalla , Biswarup Satpati , Kalpataru Pradhan , I. Das

We present the results of a systematic measurement of the magnetic susceptibility of small material samples in a 9.4 T MRI scanner. We measured many of the most widely used materials in MR engineering and MR micro technology, including…

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