双齿配体-1,2-C6H4SX(X=O,S)的钴化合物1H NMR研究

以¹H NMR谱学和磁化率对一些含邻苯二硫酚或巯基苯酚配体的钴化合物的磁性作了研究,并讨论了它们的电子结构。     

邻苯二甲酸—邻菲罗啉—铕—铽络合体系的荧光性能研究

波长为３６５ｎｍ的紫外光激发下均可发出特征荧光的邻苯二甲酸－邻菲罗啉－铕和铽固体络合物以机械研磨和化学作用两种方式进行混合，研究了这两系列混合络合物的荧光光谱和红外光谱。结果表明，由于铕、铽之间存在相互影响，其荧光强度变化较大，而荧光发射峰位基本不变。经化学混合后铽对铕的荧光强度有极强的敏化作用，铕对铽具有很强的猝灭作用，并用红外光谱对上述四种络合物体系的结构进行了表征     

2,5—二（甲基苯基）—1,3,4—恶二唑的红外光谱特性

本文用红外光谱法研究了２，５－（邻甲基苯基）－１，３，４－恶二唑和２，５－二（间甲基苯基）－１，３，４－恶二唑的红外光谱特性，并对其主要谱带进行了指认和比较。     

3—（9—芴甲氧基羰基）—四氢噻唑—2—硫酮振动光谱的简正坐标分析

本文采用简化一般价力场对３－（９－芴甲氧基羰基）－四氢噻唑－２－硫酮（简称Ｆｍｏｃ－ＴＴＴ）分子的振动光谱做了简正坐标分析计算，得到了一套合理的精化力常数。并对Ｔｍｏｃ－ＴＴＴ分子的振动频率进行了指认。其计算频率与实验频率的平均百分误差为０．６９１。     

VO^2＋—苏氨酸—邻菲绕啉配合物的结构及其波谱研究

本文测定了ＶＯＳＯ４与苏氨酸及ＶＯＳＯ４与苏氨酸、邻菲绕啉在不同酸度的乙二醇／水（１：１）溶液中的低温（１７３Ｋ）ＥＳＲ波谱，发现在不同ＰＨ下生成不同组成，结构的配合物，利用Ｊｏｈｎｓｏｎ的加合规则，并结合配合物的红外光谱推测了它们的可能结构，利用电子光谱推测了配合物的晶体场参数，讨论了它们的成配特性。     

铕（Ⅲ）—对茴香酸—邻菲罗啉三元配合物的合成及谱学性质

本文合成了ＥｕＬ３．ｐｈｅｎ．Ｈ２Ｏ（Ｌ＝对茴香酸根，ｐｈｅｎ＝邻菲罗啉）固体配合物，对所合成的配合物进行了元素分析，摩尔电导，ＩＲ，ＵＶ，ＮＭＲ等测试，初步研究了配合物的组成结构和性质。     

Te—Se—I玻璃及添加As和Ge元素的结构,性能与量子化学计算研究

用自洽场离散变分Ｘα（ＳＣＦ－Ｘα－ＤＶ）量子化学计算方法研究了Ｔｅ－Ｓｅ－Ｉ玻璃及添加Ａｓ和Ｇｅ元素的体系，讨论了结构、性能与化学键之间的关系。计算表明离子键和共价键强度的次序都是Ｇｅ－Ｓｅ〉Ａｓ－Ｓｅ〉Ｔｅ－Ｓｅ，与相应的玻璃转变温度的实验结果一致。含有一配位碘原子的Ｔｅ－Ｉ键比含有二配位碘原子的Ｔｅ－Ｉ键强。Ａｓ－Ａｓ和Ａｓ－Ｉ键比两类Ｔｅ－Ｉ键都强。较强的Ａｓ－Ａｓ和Ａｓ－Ｉ键取代较弱的Ｔ     

Muon and hydrogen bonding,and magnetic resonance in pure and doped 519-01519-01519-01

Results of three magnetic resonance studies on pure and doped YBa₂Cu₃O₇ (Y1237) are compared. The muon and the proton, in low concentrations, behave similarly in these cuprates; both magnetic probes bond to oxygens just below the BaO planes. Phase changes from superconducting to magnetic behavior of H-doped Y1237 correspond to similar transitions observed for either 0 depletion or (Pr,Y) mixing. Chemical phase-separation effects are unlikely to be responsible for the simultaneous observation of superconductivity and magnetism. The similarity of the physical effects caused by H doping, O depletion, or (Pr, Y) mixing in the 1/2/3 cuprates points toward a plausible magnetic origin of CuO-based superconductivity.     

预载条件下Y-Ba-Cu-O块材的悬浮力弛豫特性

文中以实验技术为手段,研究了不同工况下预载抑制悬浮力弛豫衰减的作用规律.实验以Halbach永磁轨道和三籽晶方形Y -Ba-Cu-O块材组成的系统为主要研究对象,通过改变块材的场冷方式、工作高度、预载高度等,研究这些因素对块材悬浮力弛豫的影响规律.选取30mm场冷高度、15mm工作高度,改变永磁轨道和块材,研究了轨道磁...     

Neutrino oscillation and magnetic moment from \nu - e^{-} elastic scattering

We discuss how the measurement of the elastic cross section at reactor energies can be used to extract new information on the neutrino oscillation parameters. We also consider the magnetic moment contribution and show how both effects tend to cancel each other when the total cross section is measured. To achieve the separation of each of the effects, experiments capable of measuring angular and energy distributions with respect to the outgoing electron become necessary. The sensitivity of these kind of experiments to magnetic moments, masses and mixings is discussed. We also discuss the possibility of measuring the magnetic moment of neutrinos via oscillation. Received: 12 September 1997 / Revised version: 22 December 1997 / Published online: 10 March 1998     

The magnetic phase in 2-2-1-2 superconducting materials

Three related aspects of the magnetic phase diagram are presented here: the first deals with the disruption of the antiferromagnetic order in the electron rich phase obtained by Ce doping, the second concern the role of Bi planes as a sink-buffer of carriers, the third focuses the magnetization vs. temperature curves in a variety of different bilayer materials as seen by the muons and discusses the “anomalous” behaviour in relation to theoretical predictions and neutron scattering data.     

Mixed valence on a pyrochlore lattice - as a geometrically frustrated magnet

Above 40 K, the magnetic susceptibility of the heavy Fermion spinel LiV₂O₄ has many features in common with those of geometrically frustrated magnetic insulators, while its room temperature resistivity comfortably exceeds the Mott-Regel limit. This suggests that local magnetic moments, and the underlying geometry of the pyrochlore lattice, play an important role in determining its magnetic properties. We extend a recently introduced tetragonal mean field theory for insulating pyrochlore antiferromagnets to the case where individual tetrahedra contain spins of different lengths, and use this as a starting point to discuss three different scenarios for magnetic and electronic transitions in LiV₂O₄. Received 12 March 2002 and Received in final form 3 May 2002 Published online 25 June 2002     

ECR高电荷态离子源：CAPRICE的调试

本文介绍了10GH_z CAPRICE离子源的实验装置结构、工作原理及运行中各参数对引出束流的影响,同时给出了N、O、Ne、Ar四种元素的高电荷态束流大小及其离子束的连续谱。结果是满意的。     

Unidirectional magnetic interaction in two-layer antiferromagnetic - ferromagnetic films

A study has been made of the directional stability of the unidirectional anisotropy in two-layer films of manganese and Permalloy 82 with respect to temperature and magnetic fields up to 30 kOe. The unidirectional interaction rotates into the direction of the applied magnetic field only after the antiferromagnetic layer is heated above the Neel temperature.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, Vol. 12, No. 6, pp. 16–20, June, 1969.In conclusion the authors thank A. A. Glazer and R. I. Tagirov for furnishing us the opportunity to become acquainted with the procedure for producing films having such interesting magnetic properties.     

5d过渡金属原子吸附氮化硼纳米管的第一性原理计算

采用基于密度泛函理论的第一性原理计算方法, 研究了氮化硼纳米管六元环中心吸附5d过渡金属原子后体系的几何结构, 电子结构和磁性性质. 研究发现, 吸附原子向一个氮原子或硼原子偏移; 吸附体系在费米能级附近出现明显的杂质能级; 各个体系的总磁矩随原子序数出现规律性变化, 局域磁矩主要分布在吸附原子上.     

ИССЛЕДОВАНИЕ НОРМАЛЬНЫХ ФЕРРИТОВ-ШПИНЕЛЕЙ С ПОМОЩЬЮ ЭФФЕКТА МQDССБАУЭРА

The investigations of Mössbauer spectra of Zn[Fe₂]O₄ and Cd[Fe₂]O₄ ferrites were performed in the temperature range from 4.2 to 300°K. In the antiferromagnetic phase (below 10 and 10.5°K for Zn and Cd ferrites respectively) a double structure of effective magnetic fields was observed. This fact points to the presence of the magnetic superstructure as was recently suggested by K. P. Sinha and A. P. B. Sinha [J. Phys. Soc. Japan17 (1962), Suppl. B-1, 218]. The constants of hyperfine interaction of Fe³⁺ ions in octahedral sublattice were also determined. The following values of the quadrupole splittings at 300°K were obtained: 0.35 mm/sec and 0.81 mm/sec for Zn-ferrite and Cd-ferrite respectively. The extrapolation of the effective magnetic fields to 0°K gives an approximate value of 490 kOe for both ferrites.

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On leave fromInstitute of Physics, Jagiellonian University, ul. Reymonta, Kraków, Poland.     

Fe40—45Cr30—35Co20—25Mo0—4Zr0—2合金微观结构对矫顽力的影响

研究了高矫顽力型FeCrCo合金的磁性和微观结构.实验结果表明，适当的合金成分及热处理 条件可以明显提高FeCrCo合金的矫顽力.通过透射电镜、x射线衍射等手段得出结论：主体元 素含量的提高和微量元素的掺杂可以有效地控制相的组成，磁场热处理导致强磁性相和弱磁 性相的分离，回火后形成起磁硬化作用的调幅结构.该调幅结构中较大的两相成分差有利于 提高FeCrCo合金的矫顽力. 关键词： 矫顽力 调幅分解 磁场热处理 两相结构 成分差