Long-Range Magnetic Ordering in Iron Jarosites Prepared by Redox-Based Hydrothermal Methods

2005 ◽  
Vol 127 (25) ◽  
pp. 8985-8993 ◽  
Author(s):  
Bart M. Bartlett ◽  
Daniel G. Nocera
Keyword(s):  
Long Range ◽  
Magnetic Ordering ◽  
Hydrothermal Methods

Phase transformation and Raman spectra in BaTiO3 nanocrystals

2002 ◽  
Vol 718 ◽  
Author(s):  
Jian Yu ◽  
X. J. Meng ◽  
J.L. Sun ◽  
G.S. Wang ◽  
J.H. Chu
Keyword(s):  
Particle Size ◽  
Phase Transformation ◽  
Low Temperature ◽  
Long Range ◽  
Lattice Expansion ◽  
Inversion Symmetry ◽  
Range Interaction ◽  
Cooperative Phenomena ◽  
Long Range Interaction ◽  
Hydrothermal Methods

AbstractIn this paper, size-induced ferroelectricit yweakening, phase transformation, and anomalous lattice expansion are observed in nanocrystalline BaTiO3 (nc-BaTiO3) deriv ed b y low temperature hydrothermal methods, and they are w ellunderstood using the terms of the long-range interaction and its cooperative phenomena altered by particle size in covalen t ionic nanocrystals. In cubic nc-BaTiO3, five modes centerd at 186, 254, 308, 512 and 716 cm-1 are observed Raman active in cubic nanophase, and they are attributed to local rhombohedral distortion breaking inversion-symmetry in cubic nanophase. The254 and 308 cm-1 modes are significantly affected not only by the concentration of hydroxyl defects, but also their particular configuration. And the 806 cm-1 modes found to be closely associated with OH - absorbed on grain boundaries.

scholarly journals Interdependent scaling of long-range oxygen and magnetic ordering in nonstoichiometric Nd2NiO4.10

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Sumit Ranjan Maity ◽  
Monica Ceretti ◽  
Lukas Keller ◽  
Jürg Schefer ◽  
Martin Meven ◽  
...  
Keyword(s):  
Long Range ◽  
Magnetic Ordering

scholarly journals Emergent long-range magnetic order in ultrathin (111)-oriented LaNiO3 films

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Margaret M. Kane ◽  
Arturas Vailionis ◽  
Lauren J. Riddiford ◽  
Apurva Mehta ◽  
Alpha T. N’Diaye ◽  
...  
Keyword(s):  
Long Range ◽  
Degrees Of Freedom ◽  
Magnetic Order ◽  
Magnetic Ordering ◽  
Anomalous Hall Effect ◽  
X Ray Diffraction ◽  
X Ray ◽  
Range Magnetic Order ◽  
Film Substrate ◽  
Long Range Magnetic Order

AbstractThe emergence of ferromagnetism in materials where the bulk phase does not show any magnetic order demonstrates that atomically precise films can stabilize distinct ground states and expands the phase space for the discovery of materials. Here, the emergence of long-range magnetic order is reported in ultrathin (111) LaNiO3 (LNO) films, where bulk LNO is paramagnetic, and the origins of this phase are explained. Transport and structural studies of LNO(111) films indicate that NiO6 octahedral distortions stabilize a magnetic insulating phase at the film/substrate interface and result in a thickness-dependent metal–insulator transition at t = 8 unit cells. Away from this interface, distortions relax and bulk-like conduction is regained. Synchrotron x-ray diffraction and dynamical x-ray diffraction simulations confirm a corresponding out-of-plane unit-cell expansion at the interface of all films. X-ray absorption spectroscopy reveals that distortion stabilizes an increased concentration of Ni2+ ions. Evidence of long-range magnetic order is found in anomalous Hall effect and magnetoresistance measurements, likely due to ferromagnetic superexchange interactions among Ni2+–Ni3+ ions. Together, these results indicate that long-range magnetic ordering and metallicity in LNO(111) films emerges from a balance among the spin, charge, lattice, and orbital degrees of freedom.

scholarly journals The Peter Day Series of Magnetic (Super)Conductors

2021 ◽  
Vol 7 (7) ◽  
pp. 93
Author(s):  
Samia Benmansour ◽  
Carlos J. Gómez-García
Keyword(s):  
Magnetic Properties ◽  
Electrical Properties ◽  
Metal Complexes ◽  
Long Range ◽  
Magnetic Ordering ◽  
Metallic Conductivity ◽  
Electrical And Magnetic Properties ◽  
Super Conducting ◽  
Paramagnetic Metals

Here, we review the different series of (super)conducting and magnetic radical salts prepared with organic donors of the tetrathiafulvalene (TTF) family and oxalato-based metal complexes (ox = oxalate = C2O42−). Although most of these radical salts have been prepared with the donor bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF = ET), we also include all the salts prepared with other TTF-type donors such as tetrathiafulvalene (TTF), tetramethyl-tetrathiafulvalene (TM-TTF), bis(ethylenediseleno)tetrathiafulvalene (BEST), bis(ethylenedithio)tetraselenafulvalene (BETS) and 4,5bis((2S)-2-hydroxypropylthio)-4’,5’-(ethylenedithio)tetrathiafulvalene (DMPET). Most of the oxalate-based complexes are monomers of the type [MIII(C2O4)3]3−, [Ge(C2O4)3]2− or [Cu(C2O4)2]2−, but we also include the reported salts with [Fe2(C2O4)5]4− dimers, [MII(H2O)2[MIII(C2O4)3]2]4− trimers and homo- or heterometallic extended 2D layers such as [MIIMIII(C2O4)3]− and [MII2(C2O4)3]2−. We will present the different structural families and their magnetic properties (such as diamagnetism, paramagnetism, antiferromagnetism, ferromagnetism and even long-range magnetic ordering) that coexist with interesting electrical properties (such as semiconductivity, metallic conductivity and even superconductivity). We will focus on the electrical and magnetic properties of the so-called Day series formulated as β”-(BEDT-TTF)4[A+MIII(C2O4)3]·G, which represents the largest family of paramagnetic metals and superconductors reported to date, with more than fifty reported examples.

Cyano-bridged terbium(iii)–chromium(iii) bimetallic quasi-one-dimensional assembly exhibiting long-range magnetic ordering

2012 ◽  
Vol 41 (5) ◽  
pp. 1624-1629 ◽  
Author(s):  
Yang Guo ◽  
Gong-Feng Xu ◽  
Chao Wang ◽  
Ting-Ting Cao ◽  
Jinkui Tang ◽  
...  
Keyword(s):  
Long Range ◽  
Magnetic Ordering ◽  
One Dimensional

scholarly journals Long-Range Magnetic Ordering in a TbIII–MoV Cyanido-Bridged Quasi-One-Dimensional Complex

2007 ◽  
Vol 119 (32) ◽  
pp. 6193-6196 ◽  
Author(s):  
Ferry Prins ◽  
Edoardo Pasca ◽  
L. Jos de Jongh ◽  
Huub Kooijman ◽  
Anthony L. Spek ◽  
...  
Keyword(s):  
Long Range ◽  
Magnetic Ordering ◽  
One Dimensional

Long-range magnetic order in the porous metal–organic framework Ni(pyrazine)[Pt(CN)4]

2017 ◽  
Vol 19 (43) ◽  
pp. 29084-29091
Author(s):  
J. Alberto Rodríguez-Velamazán ◽  
Olivier Roubeau ◽  
Roberta Poloni ◽  
Elsa Lhotel ◽  
Elías Palacios ◽  
...  
Keyword(s):  
Long Range ◽  
Coordination Compounds ◽  
Magnetic Order ◽  
Metal Organic Framework ◽  
Magnetic Ordering ◽  
Porous Metal ◽  
Range Magnetic Order ◽  
Metal Organic ◽  
Long Range Magnetic Order ◽  
Organic Framework

Long-range magnetic ordering is demonstrated in {Ni(pyrazine)[Pt(CN)4]}, which opens new perspectives for multifunctionality in this class of porous coordination compounds.

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