阅读感想2.docx

。The Charge-Density-Wave Destruction and Ferromagnetic Order in SmNiC2 published in PHYSICAL REVIEW LETTERS mainly introduce the following things: The charge-density-wave (CDW) transition is firstly found in electron-lattice interaction of low-dimensional metallic systems. X-ray scattering and electrical resistivity measurements were done on SmNiC2. x-ray diffraction experiments have indicated that satellite peaks characterized by q1=(0.5, n, 0) appear below T1 1= 148 K and that they vanish below TC 1=17.7 K. The temperature dependence of the electrical resistivity shows a sharp inflection at T1 and an large change at TC, which can be interpreted as the formation and destruction of a CDW state. The compound SmNiC2 is a novel system characterized by the interaction between the CDW and the magnetic ordering. The Universal Electromotive Force Induced by DomainWall Motion published in PHYSICAL REVIEW LETTERS mainly state : The interplay of charge transport and spin dynamics is a central theme of spintronics research.The electromotive force induced by a moving magnetic domain wall in a nanostrip has been calculated on theory and detected in experiments.The theory show the electromotive force generated by the motion of an arbitrary spin texture and attained a universal ferro-Josephson relationfor a Domain Wall moving in a nanostrip. The theory give a general result Vx/H 1=11.6 nV/Oe for a field-driven DW, which is independent of the details of its internal structure. They have detected experimentally the voltage yielded during the motion of a single domain wall over a rangeof driving field and find a result that accord well with this prediction. The Observation of Chiral Heat Transport in the Quantum Hall Regime published in PHYSICAL REVIEW LETTERS mainly state: Heat transport in the quantum Hall regime is studied using micron-scale heaters and thermometers positioned along the edge of a millimeter-scale two dimensional electron system (2DES). The heaters based on localized current injection into the 2DES, and the thermometers are based on the thermoelectric effect. In the v=1 integer quantized Hall state, a thermoelectric signal appears at an edge thermometer in the sense of electronic edge transport from the heater. When the distance between the heater and the thermometer is increased, the thermoelectric signal is reduced, which show that the electrons cool as they propagate along the edge. The Role of the Antiferromagnetic Bulk Spin Structure on Exchange Bias published in PHYSICAL REVIEW LETTERS mainly state : it is still controversial whether EB is purely controlled by the interface or AF bulk. They believe a bulk AF magnetic structure plays an important role in pinning the uncompensated interfacial moments that account for exchange bias.In other words,the cooling field dependence of the exchange bias field in ferromagnet/antiferromagnet (FM/AF) multilayers indicates that the bulk AF spin structure plays a crucial role on the origin of exchangebias. It were designed to eliminate any interlayer exchange coupling between the FM slabs by FM/AF/FM trilayers. By choosing the magnetic cooling field, the AF is ordered below its Neel temperature with the FMlayers fully saturated either parallel or antiparallel to each other. The experiment was done by vibrating sample magnetometry (VSM) and the magneto-optical Kerr effect (MOKE).This