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Co$_{1-x}$Mn$_x$Cr$_2$O$_4$ crystallizes as a normal spinel in the cubic $Fd \overline{3}m$ space group, and the end members have been reported to display a region of collinear ferrimagnetism as well as a low-temperature spin-spiral state…

We calculate the magnetostatic energy of synthetic ferrimagnet (SyF) elements, consisting of two thin ferromagnetic layers coupled antiferromagnetically through RKKY coupling. We calculate exact formulas as well as approximate yet accurate…

材料科学 · 物理学 2011-10-13 Olivier Fruchart , Bernard Dieny

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…

应用物理 · 物理学 2023-12-18 Lin Luo , Hongxian Shen , Lunyong Zhang , Yongjiang Huang , Jianfei Sun , Manh-Huong Phan

Using an adapted Sn-flux growth technique we obtained comparatively large CeFeAsO single crystals of better quality than previously reported polycrystals or single crystals, as evidenced by much sharper anomalies at the structural and…

超导电性 · 物理学 2010-05-06 A. Jesche , C. Krellner , M. de Souza , M. Lang , C. Geibel

Multiferroic materials, which simultaneously exhibit ferroelectricity and magnetism, have attracted substantial attention due to their fascinating physical properties and potential technological applications. With the trends towards device…

We report a successful synthesis of monodisperse L10-FePt nanocrystals which are not only superior in magnetism but also easy to handle through being dispersible in solvents. Thanks to a thick SiO2-coating, the thermal treatment needed to…

材料科学 · 物理学 2009-11-11 Shinpei Yamamoto , Yasumasa Morimoto , Teruo Ono , Mikio Takano

Discovery of intrinsic two-dimensional (2D) magnetic materials is crucial for understanding the fundamentals of 2D magnetism and realizing next-generation magnetoelectronic and magneto-optical devices. Although significant efforts have been…

Results are reported for single crystal specimens of Hf$_2$Te$_2$P and compared to its structural analogue Zr$_2$Te$_2$P, which was recently proposed to be a potential reservoir for Dirac physics.[1] Both materials are produced using the…

材料科学 · 物理学 2016-03-09 K. -W. Chen , S. Das , D. Rhodes , S. Memaran , T. Besara , T. Siegrist , E. Manousakis , L. Balicas , R. E. Baumbach

Perpendicular magnetic anisotropy (PMA) energy up to $K_{\mathrm{u}}=6.1\pm0.8$ MJ m$^{-3}$ is demonstrated in this study by inducing large lattice-distortion exceeding 3% at room temperature in epitaxially distorted cobalt ferrite Co$ _{x}…

材料科学 · 物理学 2021-12-03 Hiroshige Onoda , Hiroaki Sukegawa , Jun-ichiro Inoue , Hideto Yanagihara

Micro-Raman studies show that under ~700 kV/cm of d.c. voltage stressing for a few seconds, thin-film bismuth ferrite BiFeO3 phase separates into magnetite Fe3O4. No evidence is found spectroscopically of hemite alpha-Fe2O3, maghemite…

材料科学 · 物理学 2015-06-25 X. J. Lou , C. X. Yang , M. Zhang , J. F. Scott

Recently, two-dimensional ferromagnetism in the family of Chromium compounds $\rm CrXTe_3 (X=Si, Ge)$ has attracted a broad research interest. Despite the structural similarity in $\rm CrTe_6$ octahedra, the size effect of inserted Ge or Si…

应用物理 · 物理学 2021-08-03 Zefang Li , Xue Li , Bei Ding , Hang Li , Yuan Yao , Xuekui Xi , Wenhong Wang

A series of Ni0.6-x/2Zn0.4-x/2SnxFe2O4 (x = 0.0, 0.05, 0.1, 0.15, 0.2 and 0.3) (NZSFO) ferrite composites have been synthesized from nano powders using standard solid state reaction technique. The spinel cubic structure of the investigated…

材料科学 · 物理学 2017-08-02 M. A. Ali , M. M. Uddin , M. N. I. Khan , F. -U. -Z. Chowdhury , S. M. Hoque , S. I. Liba

Atomic-scale computational modeling of technologically relevant permanent magnetic materials faces two key challenges. First, a material's magnetic properties depend sensitively on temperature, so the calculations must account for thermally…

材料科学 · 物理学 2018-06-15 Christopher E. Patrick , Julie B. Staunton

Room temperature ferromagnetism was characterized for thin films of SrTi$_{0.6}$Fe$_{0.4}$O$_{3-{\delta}}$ grown by pulsed laser deposition on SrTiO$_{3}$ and Si substrates under different oxygen pressures and after annealing under oxygen…

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 %.…

材料科学 · 物理学 2009-11-07 H. Hori , S. Sonoda , T. Sasaki , Y. Yamamoto , S. Shimizu , K. Suga , K. Kindo

The observation of giant coercivity exceeding 20 kOe at low temperatures in several transition-metal-based compounds has attracted significant attention from a fundamental perspective. This research is also relevant to developing…

材料科学 · 物理学 2023-09-27 Jiro Kitagawa , Himawari Nomura , Terukazu Nishizaki

Temperature evolution of the ferromagnetic resonance (FMR) and its interference with other microwave (MW) magnons near the collinear to conical ferrimagnetic phase transition at Tc2 = 305 K is found to correlate with the evolution of the…

材料科学 · 物理学 2025-04-09 Martin Kempa , Viktor Bovtun , Dalibor Repček , Josef Buršík , Stanislav Kamba

We report high temperature synchrotron X-ray diffraction (SXRD), dc magnetization and current-voltage (I-V) characteristics for the samples of Co$_{2.75}$Fe$_{0.25}$O$_4$ ferrite. The material was prepared by chemical reaction of the Fe and…

材料科学 · 物理学 2020-04-16 R. N. Bhowmik , P. D. Babu , A. K. Sinhac , Abhay Bhisikar

Magnetic anisotropy is a crucial characteristic for enhancing spintronic device performance. The synthesis of SmCrGe$_3$ single crystals through a high-temperature solution method has led to the determination of uniaxial magnetocrystalline…

Magnetometers based on nitrogen-vacancy (NV) centers in diamond are promising room-temperature, solid-state sensors. However, their reported sensitivity to magnetic fields at low frequencies (<1 kHz) is presently >10 pT s^{1/2}, precluding…