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Related papers: Understanding High Coercivity in ThMn12-Type Sm-Zr…

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We demonstrate that low concentrations of a secondary magnetic phase in (Ga,Mn)As thin films can enhance the coercivity by factors up to ~100 without significantly degrading the Curie temperature or saturation magnetisation. Magnetic…

2:17 SmCo magnets with a quinary composition of Sm(Co,Cu,Fe,Zr)$_{7+{\delta}}$ are industrially relevant hard magnets used in high temperature and corrosive environments. Their complex cellular/lamellar nanostructure, consisting of ordered…

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…

Ensuring a permanent increase of magnetic storage densities is one of the main challenges in magnetic recording. Conventional approaches based on single phase grains are not suitable to achieve this goal, because their grain volume is…

Computational Physics · Physics 2015-06-23 Christoph Vogler , Florian Bruckner , Dieter Suess , Christoph Dellago

We report high-temperature (300-1120 K) magnetization data of Fe and Fe3O4 nanoparticles embedded in multi-walled carbon nanotubes. The magnetic impurity concerntations are precisely determined by both high-energy synchrotron x-ray…

Strongly Correlated Electrons · Physics 2011-07-20 Guo-meng Zhao , Jun Wang , Yang Ren , Pieder Beeli

This paper examines the effect of temperature on the structural stability and mechanical properties of 20 layered (10,10) single walled carbon nanotubes (SWCNTs) under tensile loading using an O(N) tight binding molecular dynamics (TBMD)…

Materials Science · Physics 2009-11-13 G. Dereli , B. Sungu

Magnetocaloric properties of an inhomogeneous magnetic system of a 7.6 nm La${}_{0.7}$Sr${}_{0.3}$MnO${}_{3}$ consisting of superparamagnetic (SPM) with blocking temperature ( $T_B$ = 240 K) and ferromagnetic (FM) phases ( $T_C$ = 290 K) is…

Materials Science · Physics 2019-07-02 Navid Mottaghi , Robbyn B. Trappen , Saeed Yousefi , Mohindar S. Seehra , Mikel B. Holcomb

We have studied the magnetic properties of the non-superconducting RuSr2Ln1.5Ce0.5Cu2O10 (Ln=Y, Dy and Ho, Ru-1222) compounds synthesized under high pressure (6 Gpa) at elevated temperature. The materials become magnetically ordered at TM…

Strongly Correlated Electrons · Physics 2016-08-31 I. Felner , V. P. S. Awana , E. Takayama-Muromachi

Wurtzite GaN:Mn films on sapphire substrates were successfully grown by use of the molecular beam epitaxy (MBE) system. The film has an extremely high Curie temperature of around 940 K, although the Mn concentration is only about 3 ~ 5 %.…

Materials Science · Physics 2009-11-07 H. Hori , S. Sonoda , T. Sasaki , Y. Yamamoto , S. Shimizu , K. Suga , K. Kindo

ZnO nanoparticles with Wurtzite structure were prepared by chemical methods at low temperature in aqueous solution. Nanoparticles are in the range from about 10 to 30 nm. Ferromagnetic properties were observed from 2 K to room temperature…

Mesoscale and Nanoscale Physics · Physics 2015-05-20 R. Escudero , R. Escamilla

Integration of Samarium Cobalt hard magnets on silicon requires buffer/protective layers that can enhance the magnetic properties of the magnet while preserving its structure and chemical composition after post-annealing treatments needed…

Materials Science · Physics 2024-07-11 F. Maspero , O. V. Koplak , A. Plaza , B. Heinz , F. Kohl , P. Pirro , R. Bertacco

In this work we investigate the potential of tetragonal L1$_0$ ordered FeNi as candidate phase for rare earth free permanent magnets taking into account anisotropy values from recently synthesized, partially ordered FeNi thin films. In…

We report the discovery of a giant out-of-plane coercivity in the Fe-doped Mn3Sn single crystals. The compound of Mn2.42Fe0.58Sn exhibits a series of magnetic transitions accompanying with large magnetic anisotropy and electric transport…

Applied Physics · Physics 2023-10-31 Weihao Shen , Yalei Huang , Xinyu Yao , Fangyi Qi , Guixin Cao

We report magnetostatic measurements for granulated films (CoFeB)$_{x}$-(SiO$_{2}$)$_{1-x}$ with fabrication induced intraplanar anisotropy. The measurements have been performed in the film plane in the wide temperature interval…

Mesoscale and Nanoscale Physics · Physics 2008-09-23 A. A. Timopheev , S. M. Ryabchenko , V. M. Kalita , A. F. Lozenko , P. A. Trotsenko , V. A. Stephanovich , A. M. Grishin , M. Munakata

We report the growth of high-quality single crystals of ThCr$_2$Si$_2$-type tetragonal BaMn$_2$P$_2$ and investigation of its structural, electrical transport, thermal and magnetic properties. Our results of basal plane electrical…

Strongly Correlated Electrons · Physics 2024-02-12 B. S. Jacobs , Abhishek Pandey

Dimerized magnets forming alternating Heisenberg chains exhibit quantum coherence and entanglement and thus can find potential applications in quantum information and computation. However, magnetic systems typically undergo thermal…

The Nd permanent magnet (Nd$_{2}$Fe$_{14}$B) is an indispensable material used in modern energy conversion devices. The realization of high coercivity at finite temperatures is a burning issue. One of the important ingredients for…

Materials Science · Physics 2021-01-20 Masamichi Nishino , Ismail Enes Uysal , Seiji Miyashita

We present in this paper the structural and magnetic properties of high aspect ratio Co nanoparticles (~10) at high temperatures (up to 623 K) using in situ X ray diffraction (XRD) and SQUID characterizations. We show that the anisotropic…

In rare-earth permanent magnets (REPM's), trade-off's between intrinsic magnetic properties are often encountered. A recent example is SmFe$_{12}$ where excellent magnetic properties can be achieved at the sacrifice of bulk structure…

Materials Science · Physics 2020-06-22 Munehisa Matsumoto , Takafumi Hawai , Kanta Ono

Thermoelectric (TE) measurements have been performed on the workhorses of today's data storage devices, exhibiting either the giant or the anisotropic magnetoresistance effect (GMR and AMR). The temperature-dependent (50-300 K) and magnetic…