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S Régnier

Publications and source records attributed to S Régnier.

3 recordsLinked to original sources
PubMed2006

Magnetic anisotropy of Co2+ as signature of intrinsic ferromagnetism in ZnO:Co.

We report on the magnetic properties of thoroughly characterized Zn(1-x)Co(x)O epitaxial thin films, with low Co concentration, x = 0.003-0.005. Magnetic and EPR measurements, combined with crystal field theory, reveal that isolated Co2+ ions in ZnO possess a strong single ion anisotropy which leads to an "easy plane" ferromagnetic state when the ferromagnetic Co-Co interaction is considered. We suggest that the peculiarities of the magnetization process of this state can be viewed as a signature of intrinsic ferromagnetism in ZnO:Co materials.

Journal Article↗
PubMed2002

Microchimerism and autoimmune diseases.

Microchimerism is defined by the presence within an individual of a low level of cells derived from another individual. Systemic sclerosis is clinically similar to chronic graft-versus-host disease, a known condition of chimerism, which has led some authors to explore the hypothesis that microchimerism may contribute to the pathogenesis of systemic sclerosis and other autoimmune disorders. This article reviews early studies that lend support to this hypothesis.

Journal Article↗