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相关论文: Room temperature tetragonal noncollinear antiferro…

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We investigate the classical antiferromagnetic Heisenberg model on the triangular lattice with up to third-nearest neighbor exchange couplings using the Nematic Bond Theory. This approach allows us to compute the free energy and the neutron…

强关联电子 · 物理学 2026-04-27 Cecilie Glittum , Olav F. Syljuåsen

(Mn,Fe)2(P,Si) single crystals have been successfully grown by flux method. Single crystal diffraction demonstrates that Mn0.83Fe1.17P0.72Si0.28 crystallizes in a hexagonal crystal structure (space group P-62m) at both 100 and 280 K, in the…

材料科学 · 物理学 2015-08-03 H. Yibole , F. Guillou , Y. K. Huang , G. R. Blake , A. J. E. Lefering , N. H. van Dijk , E. Brück

We report the structural, magnetic, and magnetocaloric properties of Co$_2$Cr$_{1-x}$Ti$_x$Al ($x=$ 0--0.5) Heusler alloys for spintronic and magnetic refrigerator applications. Room temperature X-ray diffraction and neutron diffraction…

Non-reciprocal charge transport that is strongly associated with the structural or magnetic chirality of the quantum materials system is one of the most exotic properties of condensed matter physics. Here, using magnetic alloys film…

材料科学 · 物理学 2022-06-20 K. K. Meng , K. Wang , N. N. Zhang , Z. G. Fu , J. K. Chen , Y. Wu , X. G. Xu , J. Miao , Y. Jiang

This work reports an exchange bias (EB) effect up to room temperature in the binary intermetallic bulk compound Mn3.04Ge0.96. The sample annealed at 700 K crystallizes in a tetragonal structure with ferromagnetic ordering, whereas, the…

材料科学 · 物理学 2015-06-17 Jin- Feng Qian , Ajaya K. Nayak , Guido Kreiner , Walter Schnelle , Claudia Felser

The half-Heusler alloy RuMnGa having valence electron count (VEC) 18 has recently been theoretically proposed to exhibit compensated ferrimagnetic (CFiM) character instead of the expected nonmagnetic ground state. On the other hand, a…

Recent studies have reported an interesting class of semiconductor materials that bridge the gap between semiconductors and halfmetallic ferromagnets. These materials, called spin gapless semiconductors, exhibit a bandgap in one of the spin…

材料科学 · 物理学 2013-07-15 Siham Ouardi , Gerhard H. Fecher , Jürgen Kübler , Claudia Felser

We have investigated the detailed magnetic structure of a Fe-doped MnNiGe alloy of nominal composition MnNi$_{0.75}$Fe$_{0.25}$Ge by ambient and high pressure (6 kbar) neutron powder diffraction study. The alloy undergoes a martensitic…

材料科学 · 物理学 2020-05-29 S. C. Das , J. Sannigrahi , K. Mandal , P. Dutta , S. Pramanick , D. Khalyavin , D. T. Adroja , S. Chatterjee

Heisenberg spin-1/2 chain materials are known to substantially alter their static and dynamic properties when experiencing an effective transverse staggered field originating from the varying local environment of the individual spins. We…

强关联电子 · 物理学 2016-11-26 F. Casola , T. Shiroka , V. Glazkov , A. Feiguin , G. Dhalenne , A. Revcolevschi , A. Zheludev , H. -R. Ott , J. Mesot

We report the evolution of crystallographic structure, magnetic ordering and electronic transport in thin films of full-Heusler alloy Co$_2$MnSi deposited on (001) MgO with annealing temperatures ($T_A$). By increasing the $T_A$ from…

材料科学 · 物理学 2013-06-03 Himanshu Pandey , R. C. Budhani

Searching the optimal doping compositions of the Y-type hexaferrite Ba2Mg2Fe12O22 remains a long-standing challenge for enhanced non-collinear magnetic transition temperature (TNC). Instead of the conventional trial-and-error approach, the…

We report on the perpendicular magnetic anisotropy (PMA) behavior of heavy metal (HM)/ Fe alloy/MgO thin film heterostructures after an ultrathin HfO2 passivation layer is inserted between the Fe alloy and the MgO. This is accomplished by…

材料科学 · 物理学 2017-05-10 Yongxi Ou , D. C. Ralph , R. A. Buhrman

We report on systematic temperature- and magnetic field-dependent studies of the EuGa$_4$ binary compound, which crystallizes in a centrosymmetric tetragonal BaAl$_4$-type structure with space group $I4/mmm$. The electronic properties of…

强关联电子 · 物理学 2021-12-08 H. Zhang , X. Y. Zhu , Y. Xu , D. J. Gawryluk , W. Xie , S. L. Ju , M. Shi , T. Shiroka , Q. F. Zhan , E. Pomjakushina , T. Shang

Element-specific x-ray resonant magnetic scattering investigations were performed to determine the magnetic structure of Eu in EuRh2As2. In the temperature range from 46 K down to 6 K, an incommensurate antiferromagnetic (ICM)structure with…

强关联电子 · 物理学 2010-11-17 S. Nandi , A. Kreyssig , Y. Lee , Yogesh Singh , J. W. Kim , D. C. Johnston , B. N. Harmon , A. I. Goldman

A spin model of quasi-one dimensional LiCu$_{2}$O$_{2}$ compound with ground state of ellipsoidal helical structure in which the helical axis is along the diagonal of CuO$_{4}$ squares has been adopted. By taking into account the interchain…

材料科学 · 物理学 2015-06-18 Yan Qi , An Du

A negative-positive-negative switching behavior of magnetoresistance (MR) with temperature is observed in a ferromagnetic shape memory alloy Ni_1.75Mn_1.25Ga. In the austenitic phase between 300 and 120 K, MR is negative due to s-d…

The magnetic correlations in the austenite phase and the consequent martensitic transition in inverse magnetocaloric alloys, Ni$_{2}$Mn$_{1+x}$Sn$_{1-x}$, have been a matter of debate for decades. We conclusively establish using {\it ab…

强关联电子 · 物理学 2018-11-13 Vijay Singh , Ambroise van Roekeghem , S. K. Panda , S. Majumdar , Natalio Mingo , I Dasgupta

The highly diluted antiferromagnet Mn(0.35)Zn(0.65)F2 has been investigated by neutron scattering in zero field. The Bragg peaks observed below the Neel temperature TN (approximately 10.9 K) indicate stable antiferromagnetic long-range…

无序系统与神经网络 · 物理学 2009-10-31 F. C. Montenegro , D. P. Belanger , Z. Slanic , J. A. Fernandez-Baca

We present the results of muon-spin relaxation measurements on the triangular lattice Heisenberg antiferromagnet $\alpha$-KCrO$_{2}$. We observe sharp changes in behaviour at an ordering temperature of $T_{\mathrm{c}}=23$ K, with an…

强关联电子 · 物理学 2014-06-12 F. Xiao , T. Lancaster , P. J. Baker , F. L. Pratt , S. J. Blundell , J. S. Möller , N. Z. Ali , M. Jansen

Off-stoichiometric Ni$_2$MnIn Heusler alloys have drawn recent attention due to their large magnetocaloric entropy change associated with the first-order magneto-structural transition. Here we present crystal structural, calorimetric and…