Dynamical Properties of Spin Glasses Studied by Muon Spin Relaxation
department or school: Non UBC
data provider: DSpace
contributor: TRIUMF
creator: Uemura, Yasutomo J.
issued: 2019-03-06T18:54:28Z
issued: 1981-12
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/68501
note: TfdtJ~~F REPORT LU~RA Y Thesis for a Degree of Doctor of Science . ., ' " . ,lL DYNAMICAL PROPERTIES OF SPIN GLASSES STUDIED BY MUON SPIN RELAXATION BY YASUTOMO J, UEMURA Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan. Submitted to University of Tokyo. December, 1981 . PREFACE When we visit a new city in our travelings, after a driving on a winding road, we feel a little pleasure and excitement since we may find a new friend, a different life of people ·, a small restaurant, a beautiful site, etc. In a similar way, an exciting moment comes when we obtain a new and "hot" experimental data, after some technical efforts for the measurement. Though may it be a tiny bit, we may find an unknown aspect of physical properties of substances, or confirm some other findings or principles. It is especially fascinating to study an interesting and open subject with a unique and developing experimental method, since we can contribute to many stages of such "travelings". A surprisingly sharp cusp of ac-susceptibility was f ound about ten years ago by Cannella and Mydosh in AuFe, a system of dilute magnetic moments distributed randomly in the host material. This discovery suggested a possible "phase transition", different from usual ferro- or antifer romagnetic orderings, and led to a collection of experimental and theoretical investigations of random magnetic systems, now called "spin glasses". The mechanism of the spin glass behavior is, however, not yet fully understood at present, and experimental studies of its spin dynamics have only just marked the first step. Here we have an attractive subject, related to a basic problem of "randomness" in the modern solid state physics. Thanks to the development of high intensity muon beams in the recent decade, muon spin rotation and relaxation (µSR) measurement has extensively been applied to the research of solids. After stopping polarized positive muons in the specimen, we can observe the time evolution…
has type: Thesis/Dissertation
is shown at: 10.14288/1.0376642
language: eng
peer review status: Reviewed
provider: Vancouver : University of British Columbia Library
publisher: TRIUMF
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/68501