12397-32-9Relevant academic research and scientific papers
Efficient Water Oxidation Using CoMnP Nanoparticles
Li, Da,Baydoun, Habib,Verani, Cláudio N.,Brock, Stephanie L.
, p. 4006 - 4009 (2016)
The development of efficient water oxidation catalysts based on inexpensive and Earth-abundant materials is a prerequisite to enabling water splitting as a feasible source of alternative energy. In this work, we report the synthesis of ternary cobalt mang
ThMnPnN (Pn = P, As): Synthesis, Structure, and Chemical Pressure Effects
Cao, Guang-Han,Feng, Zhifa,Hu, Bingfeng,Jing, Qiang,Li, Baizhuo,Liu, Bo,Liu, Zichen,Luo, Huiqian,Ma, Jie,Mao, Huican,Mei, Yuxue,Ren, Qingyong,Ren, Zhi,Shao, Yeting,Sun, Yuping,Tan, Shugang,Wang, Cao,Wang, Zhicheng,Xia, Yuanhua,Zhang, Fuxiang
, (2020/03/10)
Mn-based ZrCuSiAs-type pnictides ThMnPnN (Pn = P, As) containing PbO-type Th2N2 layers were synthesized. The crystal and magnetic structures are determined using X-ray and neutron powder diffraction. While neutron diffraction indicates a C-type antiferromagnetic state at 300 K, the temperature dependence of the magnetic susceptibility shows cusps at 36 and 52 K respectively for ThMnPN and ThMnAsN. The susceptibility cusps are ascribed to a spontaneous antiferromagnetic-to-antiferromagnetic transition for Mn2+ moments, which is observed for the first time in Mn-based ZrCuSiAs-type compounds. In addition, measurements of the resistivity and specific heat suggest an abnormal increase in the density of states at the Fermi energy. The result is discussed in terms of the internal chemical pressure effect.
De Haas–Van Alphen experiment and Fermi surface properties in field-induced ferromagnetic state of MNP
Kawakatsu, Shoya,Kakihana, Masashi,Nakashima, Miho,Amako, Yasushi,Nakamura, Ai,Aoki, Dai,Takeuchi, Tetsuya,Harima, Hisatomo,Hedo, Masato,Nakama, Takao,ōnuki, Yoshichika
, (2019/06/19)
MnP is a prototype 3d-itinerant magnet but still a compound under considerable study. This is based on the characteristic magnetic phases including the helical, cone, and fan structures and a variety of phase transitions with a Lifshitz tricritical point. The Fermi surface properties, however, have been scarcely studied. We have thus carried out a de Haas–van Alphen (dHvA) experiment using a high-quality single-crystal sample grown by the Sn-flux method. Many dHvA branches are observed, ranging from 2.8 × 106 to 9.45 × 107 Oe. The corresponding cyclotron effective masses are moderately heavy, 0.7 ? 10m0 (m0: rest mass of an electron), reflecting itinerant Mn-3d electrons.
Growth of bulk single-crystal MnP helimagnet and its structural and NMR characterization
Zhigadlo, Nikolai D.,Barbero, Nicolo,Shiroka, Toni
, p. 1027 - 1034 (2017/08/02)
Bulk single crystals of manganese phosphide (MnP) were grown from melt at 1 GPa and 1200 °C by using a cubic-anvil, high-pressure, and high-temperature technique. The obtained black colored crystals exhibit a plate-like morphology, with flat surfaces and maximum dimensions up to ～4 × 2 × 0.5 mm3. The orthorhombic crystal structure was confirmed by X-ray diffraction [Pnma, 62, Z = 4, a = 5.2510(4) ?, b = 3.1670(3) ?, c = 5.9098 (4) ? and V = 98.279(14) ?3]. Temperature-dependent magnetization measurements reveal the occurrence of two successive transitions: a paramagnetic to ferromagnetic transition at Tc = 290.5 K and the development of a double helimagnetic order at Ts = 44.5 K. Zero-field 31P NMR measurements in the FM and in the screw-spin AFM state show prominent features, which are compared with previous experimental data and theoretical calculations. The relatively large crystals obtained here open up new possibilities for further explorations of this interesting material.
A tetragonal polymorph of SrMn2P2 made under high pressure-theory and experiment in harmony
Xie, Weiwei,Winiarski, Micha? J.,Klimczuk, Tomasz,Cava
, p. 6835 - 6838 (2017/07/10)
Following the predictions of total energy calculations, a tetragonal SrMn2P2 phase is proposed and successfully formed under high pressure. At ambient pressure, SrMn2P2 adopts the primitive trigonal La2O3 structure type (space group P3m1). However, the results of total energy calculations indicate that SrMn2P2 should be more stable in the tetragonal ThCr2Si2 structure type (space group I4/mmm) than in its known trigonal structure, thus motivating our synthetic experiments. Guided by these calculations, a new tetragonal polymorph of SrMn2P2 was found under the relatively mild conditions of 5 GPa applied pressure at a temperature of 900 °C through the transformation of the ambient pressure trigonal form. The new polymorph has the body centered tetragonal ThCr2Si2 structure type, as predicted. The electronic structure calculations indicate the likelihood of antiferromagnetic, semiconducting properties for the high pressure SrMn2P2 phase.
Composition and structural perfection of (AIII,Mn)BV and MnBV (A = Ga, In; B = Sb, As, P) nanolayers
Dunaev,Zvonkov,Danilov,Vikhrova,Drozdov,Drozdov,Suchkov
, p. 553 - 558 (2012/07/13)
We have determined the elemental composition of laser-deposited (Ga,Mn)Sb, (In,Mn)As, MnP, MnAs, and MnSb layers. The InMnAs layers were not single-phase and contained MnAs clusters. Active Ga and Mn diffusion to the substrate and arsenic diffusion from the substrate during the GaMnSb growth process is accompanied by the formation of a GaMnAs intermediate layer. Pleiades Publishing, Ltd., 2012.
Li reaction mechanism of MnP nanoparticles
Sim, Soojin,Cho, Jaephil
, p. A669-A672 (2012/05/31)
MnP nanoparticles (MnPs) with a particle size of 7 phases. During lithium dealloying (charging to 2 V), LiMnP phase was turned into the LiP and LiP5 phases.
Preferential crystallographic alignment in polycrystalline MnP
Booth, Ryan A.,Marinescu, Melania,Liu, JinFang,Majetich, Sara A.
, p. 2571 - 2574 (2010/08/21)
The existence of preferential crystallographic alignment in hot pressed and die upset manganese phosphide (MnP) was investigated using magnetic measurements and electron backscatter diffraction (EBSD). Pole figures calculated from the EBSD data show that die upsetting causes the 〈1 1 0〉 directions to align preferentially along the die upset (DU) direction with the 〈0 0 1〉 direction preferentially perpendicular to the DU direction. Magnetic measurements show that the die upsetting can reduce the saturation field relative to that of a similar sample with randomly oriented grains. Since the low-field magnetocaloric effect in single crystals of MnP has been shown to be greatest along the 〈0 1 0〉 direction and smallest along the 〈1 0 0〉 direction, this technique offers a means to achieve the advantages of single crystal alignment with the economy of using bulk processing techniques on polycrystalline material. The peak magnetic entropy change measured with the field applied along the DU direction in the DU sample was 3%, 5%, and 8% greater than the peak entropy change of a randomly oriented powder at fields of 2.0, 1.0, and 0.5 T, respectively.
Synthesis of InP nanofibers from tri(m-tolyl)phosphine: An alternative route to metal phosphide nanostructures
Wang, Junli,Yang, Qing,Zhang, Zude,Li, Tanwei,Zhang, Shuyuan
, p. 227 - 233 (2010/03/02)
The synthesis of InP nanofibers via a new Ullmann-type reaction of indium nanoparticles with tri(m-tolyl)phosphine (P(PhMe)3) was typically performed to illustrate an alternative route for the preparation of nanostructured metal phosphides, including III-V (13-15) and transition-metal phosphides. Triarlyphosphine compounds such as other two tri(m-tolyl)phosphine isomers, diphenyl(p-tolyl)phosphine, and triphenylphosphine were comparably employed to synthesize InP nanocrystals. From the aspect of the carbonization of triarlyphosphines, Raman spectroscopy and thermo-gravimetric analysis (TGA) investigations of the InP products showed that the stability of these triarlyphosphines conformed to the order of tri(p-tolyl)phosphine ≈ tri(o-tolyl)phosphine 3) 3 (typically see: J. M. Nedeljkovic, O. I. Micic, S. P. Ahrenkiel, A. Miedaner and A. J. Nozik, J. Am. Chem. Soc., 2004, 126, 2632) and P(C8H 17)3 (C. Qian, F. Kim, L. Ma, F. Tsui, P. D. Yang and J. Liu, J. Am. Chem. Soc., 2004, 126, 1195) according to the difference in preparative temperature for phosphide synthesis. Raman and photoluminescence properties of the as-synthesized InP nanocrystals were further studied, and the synthetic mechanism of our method was reasonably investigated by GC-MS analysis. Moreover, the current route was successfully extended to prepare GaP, MnP, CoP and Pd5P2 nanocrystals. The Royal Society of Chemistry 2010.
Next-nearest neighbour contributions to P 2p3/2 X-ray photoelectron binding energy shifts of mixed transition-metal phosphides M1-xM′xP with the MnP-type structure
Grosvenor, Andrew P.,Cavell, Ronald G.,Mar, Arthur
, p. 2702 - 2712 (2008/10/09)
X-ray photoelectron (XPS) and X-ray absorption (XANES) spectroscopic measurements have been made for several series of mixed transition-metal phosphides M1-xM′xP (Co1-xMnxP, Mn1-xVxP, and Co1-xVxP), which adopt the MnP-type structure (M is more electronegative than M′). The P 2p binding energy shifts displayed by the mixed metal phosphide members do not follow the trend shown by the simple binary phosphides, a deviation which arises from the contribution of next-nearest neighbour effects operating on the primary photoemission site. The magnitude of this contribution can be derived from a simple charge potential model taking the metal electronegativity differences into account. It is suggested that these next-nearest neighbour contributions induce a charge transfer between the two dissimilar metals via metal-metal bonding, which modifies the Madelung potential experienced at the photoemission site. This charge transfer has been confirmed by analysis of the Co 2p XPS spectra as well as the P and Mn K-edge XANES spectra.
