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Low-temperature MnBi (hexagonal NiAs phase) exhibits anomalies in the lattice constants (a, c) and bulk elastic modulus (B) below 100 K, spin reorientation and magnetic susceptibility maximum near 90 K, and, importantly for high-temperature…

Materials Science · Physics 2017-11-28 N. A. Zarkevich , L. -L. Wang , D. D. Johnson

A model of magnetic interactions in the ordered ferromagnetic FePt is proposed on the basis of first-principles calculations of non-collinear magnetic configurations and shown to be capable of explaining recent measurements of magnetic…

Fluid Dynamics · Physics 2015-06-26 O. N. Mryasov , U. Nowak , K. Y. Guslienko , R. W. Chantrell

Two-dimensional magnets could potentially revolutionize information technology, but their potential application to cooling technology and magnetocaloric effect (MCE) in a material down to the monolayer limit remain unexplored. Herein, we…

Materials Science · Physics 2023-03-29 Weiwei He , Yan Yin , Qihua Gong , Richard F. L. Evans , Oliver Gutfleisch , Baixiang Xu , Min Yi , Wanlin Guo

Systematic measurements pertinent to the magnetocaloric effect and nature of magnetic transition around the transition temperature are performed in the 10 nm Pr0.5Ca0.5MnO3 nanoparticles (PCMO10) . Maxwell relation is employed to estimate…

Mesoscale and Nanoscale Physics · Physics 2015-06-11 S. Narayana Jammalamadaka , S. S. Rao , S. V. Bhat , J. Vanacken , V. V. Moshchalkov

Exploring giant magnetic anisotropy in small magnetic nanostructures is of both fundamental interest and technological merit for information storage. To prevent spin flipping at room temperature due to thermal fluctuation, large magnetic…

Atomic and Molecular Clusters · Physics 2017-09-07 Xiaoqing Liang , Xue Wu , Jun Hu , Jijun Zhao , Xiao Cheng Zeng

We have investigated magnetization(M), magnetocaloric effect(MCE) and magnetothermopower(MTEP) in polycrystalline Pr0.6Sr0.4MnO3, which shows a second-order paramagnetic to ferromagnetic transition near room temperature (TC = 305 K).…

Strongly Correlated Electrons · Physics 2012-10-19 D. V. Maheshwar Repaka , T. S. Tripathi , M. Aparnadevi , R. Mahendiran

The magneto-electric (ME) coupling on spin-wave resonances in single-crystal Cu2OSeO3 was studied by a novel technique using electron spin resonance combined with electric field modulation. An external electric field E induces a magnetic…

Strongly Correlated Electrons · Physics 2015-06-04 A. Maisuradze , A. Shengelaya , H. Berger , D. M. Djokić , H. Keller

Although ferromagnetism is in general a long-range collective phenomenon, it is possible to induce local spatial variations of magnetic properties in ferromagnetic materials. For example, systematic variation of the exchange coupling…

Materials Science · Physics 2018-08-08 B. J. Kirby , L. Fallarino , P. Riego , B. B. Maranville , Casey W. Miller , A. Berger

Nanoscale layered ferromagnets have demonstrated fascinating two-dimensional magnetism down to atomic layers, providing a peculiar playground of spin orders for investigating fundamental physics and spintronic applications. However,…

We investigate the structural, magnetocrystalline anisotropy, critical behaviour, and magnetocaloric effect in the layered room-temperature monoclinic ferromagnet Cr$_{1.38}$Te$_2$. The critical behavior is studied by employing various…

A novel effect involving the formation of a stable kink-like torsion deformation in a magnetoactive elastomer (MAE) beam subjected to a uniform magnetic field is theoretically predicted and experimentally confirmed. The phenomenon was…

We consider a simple integrable model of a spin chain exhibiting the Magnetoelectric Effect (MEE). Starting from the periodic S=1/2 XXZ-chain with Dzyaloshinskii-Moriya terms, which we consider as a local electric polarization in the spirit…

Strongly Correlated Electrons · Physics 2013-02-18 Michael Brockmann , Andreas Klümper , Vadim Ohanyan

Existence of anisotropic Curie temperature materials [E. R. Callen, Phys. Rev. 124, 1373 (1961)] is a longstanding prediction - materials that become paramagnetic along certain crystal directions at a lower temperature while remaining…

Mesoscale and Nanoscale Physics · Physics 2015-06-04 Jason N. Armstrong , Susan Z. Hua , Harsh Deep Chopra

Structural, magnetic and magnetotransport properties of (Bi$_{1-x}$Eu$_x$)$_2$Se$_3$ thin films have been studied experimentally as a function of Eu content. The films were synthesized by MBE. It is demonstrated that Eu distribution is not…

Mn1.5X0.5Sn (X = Cr, Mn, Fe, Co) nanomaterials in the hexagonal Ni2In-type crystal structure have been prepared using arc-melting and melt spinning. All the rapidly quenched Mn1.5X0.5Sn alloys show moderate saturation magnetizations with…

Materials Science · Physics 2015-06-23 R. Fuglsby , P. Kharel , W. Zhang , S. Valloppilly , Y. Huh , D. J. Sellmyer

Search for ultrathin magnetic film with large perpendicular magnetocrystalline anisotropy (PMA) has been inspired for years by the continuous miniaturization of magnetic units in spintronics devices. The common magnetic materials used in…

Materials Science · Physics 2018-06-07 Xiaoxuan Ma , Jun Hu

Magnetocaloric microwires are very promising for energy-efficient magnetic refrigeration in micro electromechanical systems (MEMS) and nano electromechanical systems (NEMS). Creating microwires that exhibit large magnetocaloric effects…

Applied Physics · Physics 2023-12-18 Lin Luo , Hongxian Shen , Lunyong Zhang , Yongjiang Huang , Jianfei Sun , Manh-Huong Phan

Continuous miniaturization of magnetic units in spintronics and quantum computing devices inspires efforts to search for magnetic nanostructures with large magnetic anisotropy energy (MAE). Typical nanostructures including molecular…

Materials Science · Physics 2014-04-15 Jun Hu , Ruqian Wu

We present a novel finite-temperature second-order perturbation method incorporating spin-orbit coupling to investigate the temperature-dependent site-resolved contributions to the magnetocrystalline anisotropy energy (MAE), specifically…

Materials Science · Physics 2023-08-23 Shogo Yamashita , Akimasa Sakuma

Reactive single-step hot-pressing at 1473 K and 35 MPa for 4 h produces dense, bulk, near single-phase, low-cost and low-criticality Fe$_2$Al$_{1.15}$B$_2$ and Fe$_2$Al$_{1.1}$B$_2$Ge$_{0.05}$Ga$_{0.05}$ MAB samples, showing a second-order…