2018 CAP Congress / Congrès de l'ACP 2018

Session

M3-5 Magnetism (DCMMP) | Magnétisme (DPMCM)

M3-5

11 Jun 2018, 16:15

Dalhousie University

Conveners

M3-5 Magnetism (DCMMP) | Magnétisme (DPMCM)

• Graeme Luke (McMaster University)

2249. Confinement of magnetic monopole quasiparticles in a quantum spin ice (I)

Prof. Christopher Ryan Wiebe

11/06/2018, 16:15

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Invited Speaker / Conférencier(ère) invité(e)

We report direct spectroscopic evidence of correlations between monopoles in a quantum spin ice. A hierarchy of unequally spaced magnetic excitations has been observed via low energy inelastic neutron spectroscopy in Pr2Sn2O7, resembling the confinement of spin defects in low-dimensional quantum magnets.[1],[2] Using a simple linear potential model to fit the excitations, we have estimated...

2181. Neutron scattering study of skyrmions in MnSi thin films

Prof. Theodore Monchesky (Dalhousie University)

11/06/2018, 16:45

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral (Non-Student) / Orale (non-étudiant(e))

Chiral interactions in magnetic materials are unique in their ability to stabilize static magnetic solitons, known as skyrmions. At surfaces and interfaces, the chiral interaction results in novel magnetic surface states [1]. These surface twists help to further stabilize skyrmions in thin films [2], together with the influence of epitaxy induced magnetocrystalline anisotropy. These...

2199. Ultralow Thermal Conductivity and Novel Thermoelectric Materials

Dr Jan-Hendrik Pöhls (University of Alberta)

11/06/2018, 17:00

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

2018 DCMMP PhD Thesis Award Competition

More than half of the energy produced worldwide is currently lost as heat and recovering even a fraction of that would be beneficial for global climate change. Toward this aim, thermoelectric materials can recover waste heat and convert it to useful energy. However, thermoelectrics are not widely commercially applied due to high cost and low efficiency. The search for new high-performance...

2182. Reversibility of Magnetic Behavior in High Entropy Oxides (G)

Ms Tahereh Afsharvosoughi (Brock University)

11/06/2018, 17:15

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral (Graduate Student) / Orale (Étudiant(e) du 2e ou 3e cycle)

High entropy materials are a group of materials that can be potentially used in extreme temperature applications and have interesting properties such as hardness, toughness, and corrosion resistance. In particular, high entropy oxides have attracted attention due to intriguing properties such as colossal permittivity and superionic conductivity. Since high entropy oxides are achieved from...

2246. Frustrated magnetic pyrochlore thin films (I)

Michel Gingras (University of Waterloo)

11/06/2018, 17:30

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Invited Speaker / Conférencier(ère) invité(e)

Motivated by the recent experimental realizations of pyrochlore thin films, I will explore in this talk some of the promising facets offered by the slab geometry. Thin films are a natural platform to study the confinement of spin-liquid gauge fields and the evolution from three to two dimensional spin textures. In spin ice films for example, monopole excitations may crystallize on the...