Search for dissertations about: "néel temperature"

Showing result 1 - 5 of 8 swedish dissertations containing the words néel temperature.

  2. 1. Thermal and stress induced gamma to epsilon martensitic transformations in Fe-Mn-Si shape memory alloys

    Author : Magnus Andersson; KTH; []
    Keywords : Fe; Mn; Si; Epsilon martensite; Transformation temperatures; Enthalphy; Stress induced; Magnetic transformation; Néel temperature; Shape memory; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : .... READ MORE

  4. 2. Investigations of Transition Metal Systems : Angle-Resolved Photoelectron Spectroscopy at Low and High Energy

    Author : Thomas Claesson; Oscar Tjernberg; Kevin Smith; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; angle-resolved photoelectron spectroscopy; electronic structure; oxides; high-temperature superconductors; Material physics with surface physics; Materialfysik med ytfysik;

    Abstract : The work presented in this thesis aims at achieving an increased understanding of the electronic structure of materials whose properties are to a large extent governed by transition metals. All studies are based on data from angle-resolved photoelectron spectroscopy (ARPES) employed on the valence band of the studied systems. READ MORE

  5. 3. Hard magnetism in novel glassy bulk Nd-Fe-Al

    Author : Richardo J. Ortega-Hertogs; KTH; []
    Keywords : ;

    Abstract : This thesis focuses on the magnetic properties of a newclass of Nd-based bulk glassyhard magnet, by measuring themagnetization in AC- and DC- fields up to 30 tesla, in thetemperature range 1 - 570 K. The main results of ourinvestigations and analyses in the framework of existing modelsare summarized as follows:1) The bulk glassy Nd-Fe-Al is found to be magneticallyisotropic, with hysteresis losses Wh?120 kJ/m3and maximum energy product (BH)max?2. READ MORE

  6. 4. Antiferromagnets and Luttinger Liquids: Two Strongly Correlated Systems

    Author : Ann Mattsson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Strongly correlated systems show a variety of intriguing properties and have been extensively studied over the years. In this thesis two strongly correlated systems are discussed: the two-dimensional antiferromagnet and the Luttinger liquid. The Luttinger liquid has attracted much interest as a paradigm of non-Fermi liquid behavior. READ MORE

  7. 5. Synthesis, Nuclear Structure, and Magnetic Properties of some Perovskite Oxides

    Author : Mehreteab Tseggai; Per Nordblad; Roland Tellgren; Torbjörn Gustafsson; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Magnetic Perovskites; Neutron powder diffraction; SQUID; Synthesis; Nuclear structure; Antiferromagnetism; Ferromagnetism; Superexchange; Double exchange; Colossal magnetoresistance; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Abstract : Synthesis, nuclear structure, and magnetic properties of the perovskites: Nd0.7-xMgxSr0.3MnO3 (x=0.0, 0. READ MORE