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A new compound with a quasi-two-dimensional array of FeSe3O tetrahedra and an orthorombic structure, namely BaFe2Se2O, has been successfully fabricated. Experimental results show that this compound is an insulator and has an…

强关联电子 · 物理学 2015-06-05 Fei Han , Xiangang Wan , Bing Shen , Hai-Hu Wen

For CaCu$_{3}$Ti$_{4}$O$_{12}$ -- an insulator that exhibits a giant dielectric response above 100 K -- Cu$^{2+}$ antiferromagnetic spin ordering has been investigated by magnetic Raman scattering and magnetization measurements. Below the…

强关联电子 · 物理学 2007-05-23 A. Koitzsch , G. Blumberg , A. Gozar , B. Dennis , A. P. Ramirez , S. Trebst , Shuichi Wakimoto

We report the enhancement of N\'eel temperature of Cr2O3 by replacing 50% of Cr by Fe prepared by sol-gel method. The structural analysis by neutron diffraction has revealed that FeCrO3 belongs to a corundum structure (R-3c space group)…

材料科学 · 物理学 2019-11-26 Rajesh kumar R , C. Dhanasekhar , N. Vijay Prakash Chaudhary , A. Das , A. Venimadhav

The thermodynamics of the antiferromagnetic ordering transition in NiO and the photoelectron spectra in the antiferromagnetic phase are studied by the Variational Cluster Approximation. Using realistic Racah parameters to describe the…

强关联电子 · 物理学 2015-04-01 R. Eder

We report a structural, thermodynamic and transport study of the newly synthesized Sr5Rh4O12, Ca5Ir3O12 and Ca4IrO6 single crystals. These quasi-one-dimensional insulators consist of a triangular lattice of spin chains running along the…

强关联电子 · 物理学 2015-06-25 G. Cao , V. Durairaj , S. Chikara , S. Parkin , P. Schlottmann

The insulating iron compounds Eu$_2$SrFe$_2$O$_6$ and Sr$_3$Fe$_2$O$_4$Cl$_2$ have high-temperature antiferromagnetic (AF) order despite their different layered structures. Here we carry out density functional calculations and Monte Carlo…

强关联电子 · 物理学 2022-08-18 Di Lu , Ke Yang , Lu Liu , Guangyu Wang , Hua Wu

We report electrical, magnetic, magnetodielectric and magnetoabsorption properties of a polycrystalline GaFeO3. The resistivity measurement shows that the sample is highly insulating below 200 K and the resistivity above 200 K obey the…

材料科学 · 物理学 2015-05-14 V. B. Naik , R. Mahendiran

We report an experimental and computational study of magnetic and electronic properties of the layered Ru(V) oxide SrRu2O6 (hexagonal, P-3 1m), which shows antiferromagnetic order with a N\'eel temperature of 563(2) K, among the highest for…

Several M3 TeO6 (M = Mn, Co, Ni, Cu) oxides order antiferromagnetically at low temperatures (near or below 60 K), while displaying interesting dielectric properties at high temperatures (ferroelectricity below 1000 K in M = Ni case). We…

强关联电子 · 物理学 2013-08-27 R. Mathieu , S. A. Ivanov , P. Nordblad , M. Weil

The experimental studies of the paramagnetic-antiferromagnetic phase transition through M\"{o}ssbauer spectroscopy and measurements of temperature and field dependencies of magnetic susceptibility in the layered Cu$_{0.15}$Fe$_{0.85}$PS$_3$…

计算物理 · 物理学 2023-01-05 V. Pashchenko , O. Bludov , D. Baltrunas , K. Mazeika , S. Motria , K. Glukhov , Yu. Vysochanskii

We use neutron scattering to study temperature dependent spin excitations in insulating antiferromagnetic (AF) Rb$_{0.8}$Fe$_{1.6}$Se$_2$. In the low-temperature AF state, spin waves can be accurately described by a local moment Heisenberg…

We investigated the magnetic phase diagram of single crystals of SrNdFeO$_{4}$ by measuring the magnetic properties, the specific heat and the dielectric permittivity. The system has two magnetically active ions, Fe$^{3+}$ and Nd$^{3+}$.…

材料科学 · 物理学 2015-06-05 J. M. Hwang , E. S. Choi , H. D. Zhou , Y. Xin , J. Lu , P. Schlottmann

We present here measurements of the thermopower, thermal conductivity, and electrical resistivity of the newly reported compound CaFe4As3. Evidence is presented from specific heat and electrical resistivity measurements that a substantial…

强关联电子 · 物理学 2015-05-28 M. S. Kim , Z. P. Yin , L. L. Zhao , E. Morosan , G. Kotliar , M. C. Aronson

Hematite ($\alpha$-Fe$_2$O$_3$) is an antiferromagnetic material with a very low spin damping and high N\'eel temperature. The temperature dependence of the antiferromagnetic resonance in a bulk single crystal of hematite was characterized…

材料科学 · 物理学 2022-12-05 M. Białek , J. Zhang , H. Yu , J. -Ph. Ansermet

We report results of the Raman measurements for SrRu$_2$O$_6$ having extraordinary high N$\acute{\textrm{e}}$el temperature for a layered material. No additional phonon modes were detected at the temperature of magnetic transition thus…

材料科学 · 物理学 2019-02-13 Yu. S. Ponosov , E. V. Komleva , D. A. Zamyatin , R. I. Walton , S. V. Streltsov

We have investigated the magnetic and electrical resistance behaviour of Ca$_{3-x}$Y$_x$LiRuO$_6$. The parent compound exhibits magnetic ordering from Ru sublattice at a rather high temperature, 113 K. Though the paramagnetic Curie…

材料科学 · 物理学 2016-08-31 M. Mahesh Kumar , E. V. Sampathkumaran

NpCoGe, the neptunium analogue of the ferromagnetic superconductor UCoGe, has been investigated by dc-magnetization, ac-susceptibility, specific heat, electrical resistivity, Hall effect, 237Np Moessbauer spectroscopy and LSDA calculations.…

强关联电子 · 物理学 2015-06-18 E. Colineau , J. -C. Griveau , R. Eloirdi , P. Gaczyński , S. Khmelevskyi , A. B. Shick , R. Caciuffo

In this work, a study of the magnetic behavior of the spinel ZnFe2O4 is presented by using the Monte Carlo simulations (MCS). The iron atoms provide the magnetism in this material. In fact, the magnetic spin of moment of the Fe3+ ions is…

材料科学 · 物理学 2020-02-18 R. Khalladi , S. Idrissi , N. El Mekkaoui , H. Labrim , I. El Housni , S. Ziti , S. Mtougui , L. Bahmad

Magnetometry, electrical transport, and neutron scattering measurements were performed on single crystals of the Fe^{4+}-containing perovskite-related phase Sr_3Fe_2O_7-x as a function of oxygen content. Although both the crystal structure…

强关联电子 · 物理学 2013-06-12 D. C. Peets , J. -H. Kim , P. Dosanjh , M. Reehuis , A. Maljuk , N. Aliouane , C. Ulrich , B. Keimer

Structural, electronic, and magnetic properties of undoped and aliovalent-ion (Ca, F)-doped LaOFeP, which undergo superconducting transitions at transition temperatures (Tc) 4-7 K [Kamihara et al, J. Am. Chem. Soc. 128, 10012, (2006)], were…

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