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Far-from-equilibrium magnetization dynamics can be accessed when a magnetic material is subject to a femtosecond excitation, such as an optical laser or an electric current. Numerically, the demagnetization of magnetic materials is…

Mesoscale and Nanoscale Physics · Physics 2026-03-10 Ezio Iacocca

We present Monte Carlo and Langevin micromagnetic calculations to investigate thermal switching of single-domain ferromagnetic particles. For the Monte Carlo study we place particular emphasis on the probability that the magnetization does…

Materials Science · Physics 2007-05-23 M. A. Novotny , G. Brown , P. A. Rikvold

Thermal fluctuation of local magnetization in magnetic metals intercoupled with charge carriers and phonons offers a path to enhance thermoelectric performance. The thermopower enhancement by spin fluctuations (SF) has been observed before.…

Materials Science · Physics 2021-10-22 Md Mobarak Hossain Polash , Daryoosh Vashaee

Thermoelectric (TE) properties of a single nanowire (NW) are investigated in a microlab which allows the determination of the Seebeck coefficient S and the conductivity {\sigma}. A significiant influence of the magnetization of a 70 nm…

Mesoscale and Nanoscale Physics · Physics 2011-11-09 Rüdiger Mitdank , Martin Handwerg , Corinna Steinweg , William Töllner , Mihaela Daub , Kornelius Nielsch , Saskia F. Fischer

We report a detailed investigation into the metamagnetism of Sr3Ru2O7 at low temperatures for the magnetic field parallel to the ruthenium oxygen planes. The metamagnetism is studied as a function of temperature, magnetic field and sample…

Strongly Correlated Electrons · Physics 2009-11-10 Robin S. Perry , Takashi Tayama , Kentaro Kitagawa , Toshiro Sakakibara , Kenji Ishida , Yoshiteru Maeno

Highly energetic magnetic fluctuations, discovered in high-temperature superconductors (HTSC) by inelastic neutron scattering (INS), are now widely believed to be vital for the superconductivity. In two competing scenarios, they either…

Strongly Correlated Electrons · Physics 2011-12-05 Igor A. Zaliznyak , Zhijun Xu , John M. Tranquada , Genda Gu , Alexei M. Tsvelik , Matthew B. Stone

The magnetic nature of the altermagnet candidate RuO$_2$ remains under debate. It has been recently shown from quantum oscillations and angle-resolved photoemission spectroscopy (ARPES) that the high-quality RuO$_2$ bulk single crystal is a…

We report multiferroic behavior in double perovskite Y2CoMnO6 with ferroelectric transition temperature Tc = 80K. The origin of ferroelectricity is associated with magnetic ordering of Co2+ and Mn4+ moments in a up-up-down-down arrangement.…

Materials Science · Physics 2015-06-15 G. Sharma , J. Saha , S. Patnaik

The compound, Tb5Si3, crystallizing in Mn5Si3-type hexagonal structure, was recently reported by us to exhibit a sudden and huge enhancement in electrical resistivity (rho) at a critical magnetic field (H_cr) in the magnetically ordered…

Strongly Correlated Electrons · Physics 2015-05-14 Niharika Mohapatra , Sitikantha D Das , K. Mukherjee , Kartik K Iyer , E. V. Sampathkumaran

The metamagnetic transition between the antiferromagnetic and paramagnetic state in UIrGe has been studied at various temperatures by magnetization, heat capacity and magnetocaloric-effect measurements on a single crystal in static and…

The rare-earth ions (RE = Eu, Dy Ho, Tm, Y) substituted charge-ordered antiferromagnetic manganites, Pr0.45RE0.05Ca0.5MnO3, were studied for the magnetic and the transport properties in the presence of external magnetic-fields of up to 14…

Materials Science · Physics 2007-05-23 K. R. Mavani , P. L. Paulose

In this paper, specific features of Sm magnetism in an intermetallic compound have been studied. For this purpose, a high-quality single crystal of SmPd2Al3 was grown and subjected to detailed measurements of specific heat, magnetization,…

Strongly Correlated Electrons · Physics 2010-01-26 J. Pospisil , M. Kratochvilova , J. Prokleska , M. Divis , V. Sechovsky

Near the Curie temperature the anisotropy field of magnetically uniaxial L10 FePt is expected to follow the scaling law $(1-T/Tc)^\beta$ where $T$ is the temperature and $T_c$ the Curie temperature. In the literature $\beta$ values between…

Mesoscale and Nanoscale Physics · Physics 2017-06-28 H. J. Richter , G. J. Parker

The finite-temperature transport properties of FeRh compounds are investigated by first-principles Density Functional Theory-based calculations. The focus is on the behavior of the longitudinal resistivity with rising temperature, which…

Using a quantum theory including spin-splitting effect in diluted magnetic semiconductors, we study the dependence of tunneling magnetoresistance (TMR) on barrier thickness, temperature and applied voltage in GaMnAs/GaAs/GaMnAs…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Alireza Saffarzadeh , Ali A. Shokri

We prepared very high-coercivity cobalt ferrite nanoparticles using short-time high-energy mechanical milling. After the milling process, the coercivity of the nanoparticles reached 3.75 kOe - a value almost five times higher than that…

Mesoscale and Nanoscale Physics · Physics 2015-06-19 E. F. Chagas , A. S. Ponce , R. J. Prado , G. M. Silva , J. Bettini , E. Baggio-Saitovitch

Using high-resolution spin-resolved photoemission spectroscopy, we observed a thermal spin depolarization to which all spin-polarized electrons contribute. Furthermore we observed a distinct minority spin state near the Fermi level and a…

We present a study on the magnetic susceptibility $\chi(T)$ and electrical resistance, as a function of temperature and magnetic field $R(T,H)$, of the ferromagnetic heavy fermion YbNi$_2$. The X-ray diffraction analysis shows that the…

Strongly Correlated Electrons · Physics 2018-06-26 O. Olicón , R. Escamilla , A. Conde-Gallardo , F. Morales

We report the results of high-resolution dc magnetization and specific-heat measurements at very low temperatures for a single crystal \color{black} of UBe$_{13}$ in magnetic fields applied along the [001] and [111] directions, in both the…

We have studied the influence of a magnetic field on the thermodynamic properties of Ca$_{2-x}$Sr$_{x}$RuO$_4$ in the intermediate metallic region with tilt and rotational distortions ($0.2\leq x \leq 0.5$). We find strong and anisotropic…

Strongly Correlated Electrons · Physics 2009-11-11 J. Baier , T. Zabel , M. Kriener , P. Steffens , O. Schumann , O. Friedt , A. Freimuth , A. Revcolevschi , S. Nakatsuji , Y. Maeno , T. Lorenz , M. Braden
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