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Showing result 1 - 5 of 8 essays matching the above criteria.

  1. 1. Micromagnetic study of spin Hall nano-oscillator arrays and their synchronization dynamics

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Ari Sigurdsson; [2020]
    Keywords : spintronics; spin Hall nano-oscillators; spin wave; synchronization; micromagnetic modelling.; spinntronik; spinn-Hall nano-oscillatorer; spinn wave; synkronisering; mikromagnetisk modellering.;

    Abstract : Spintronics is the study of electron spins and their utilization in electronic devices. Within this field, spin-based oscillators have shown promise for mi- crowave signal generation as they can operate at high frequencies, are small in scale and are compatible with modern fabrication techniques. READ MORE

  3. 2. Tuning the Curie temperature and phase fraction of FeNi25-based alloys with Mn and Co for magnetocaloric applications

    University essay from KTH/Materialvetenskap

    Author : Marie Sanglé-Ferrière; [2020]
    Keywords : Thesis; magnetocaloric effect; Curie temperature; FCC; FeNi25; Avhandling; magnetokalorisk effekt; Curie-temperatur; FCC; FeNi25;

    Abstract : This paper discusses the search of an FeNi25-based alloy with a face-centered cubic crystal structure exhibiting a Curie point around room temperature, for magnetocaloric applications. Fe was substituted in various amounts with FCC-stabilising elements Mn and Co as these elements respectively decrease and increase the Curie Temperature, thus enabling to tune the Curie point. READ MORE

  4. 3. Transient Dynamics and Core Tunneling in Vertical Spin-Vortex Pairs

    University essay from KTH/Nanostrukturfysik

    Author : Milton Persson; [2019]
    Keywords : Spin-vortex; ultra fast vortex dynamics; milli-Kelvin temperatures; macroscopic quantum tunneling; Spinnvirvel; ultrasnabb virveldynamik; milli-Kelvin temperaturer; makroskopisk kvanttunnling;

    Abstract : Spin-vortices in vertically spaced pairs of thin elliptical Permalloy nanoparticles are investigated. The two vortex cores with parallel out-of-plane magnetization exhibit a strong monopole-like attraction through the spacer much thinner than the core length, thus forming a bound core-core pair. READ MORE

  5. 4. Constraining the duration of eruptions of the Rangitoto volcano, New Zealand, using paleomagnetism

    University essay from Lunds universitet/Geologiska institutionen

    Author : Linda Aulin; [2017]
    Keywords : Rangitoto; paleomagnetism; paleointensity experiments; Auckland volcanic field; thermal demagnetization; Earth and Environmental Sciences;

    Abstract : The volcano Rangitoto belongs to the Auckland volcanic field and is situated north east of Auckland city, New Zealand. The volcanos of the Auckland volcanic field have previously thought to be of monogenetic origin, but recent studies indicate that Rangitoto has a long history of eruptions, which would suggest that the volcanic system may have entered a new phase. READ MORE

  6. 5. Paleomagnetic dating of a mysterious lake record from the Kerguelen archipelago by matching to paleomagnetic field models

    University essay from Lunds universitet/Geologiska institutionen

    Author : Kim Teilmann; [2016]
    Keywords : lake sediment; Kerguelen archipelago; paleomagnetic secular variation; paleomagnetism; paleomagnetic field models; slump deposits; Earth and Environmental Sciences;

    Abstract : Kerguelenöarna är en vulkanisk ögrupp belägen i det södra Indiska oceanen. Öarna ligger på polarfronten samt inom den cirkumpolära Antarktiska strömmen och södra halvklotets västvindsbälte. Detta gör Kerguelenöarna till en intressant plats för klimatstudier. READ MORE