Nuclear magnetic resonance studies of materials for spintronic applications

S. Wurmehl, J.T. Kohlhepp

Research output: Contribution to journalArticleAcademicpeer-review

34 Citations (Scopus)

Abstract

Since its discovery in liqs. and also in solid matter in 1946, NMR (NMR) has been widely established as a std. tool for structural anal. of a wide range of materials. This review outlines recent NMR studies on materials considered to be useful in spintronic applications. Spintronics is a new research field which combines the use of both the charge and the spin of an electron as information carriers, which promises distinct advantages over conventional electronics which makes use only of the charge of electrons. A successful application of materials in spintronic devices requires a detailed knowledge of the interplay between the structure and the magnetic and electronic properties on an at. scale. NMR probes the local environments of the active nuclei. This local character of NMR arises from local contributions to the hyperfine field, namely, the transferred field which depends on the nearest neighbor atoms and their magnetic moments. This enables NMR to study the structural properties of bulk samples as well as of thin films of spin polarized materials. Moreover, NMR spectroscopy also provides an indirect tool to measure the d. of states of spin polarized materials via a measurement of the temp. dependence of the spin-lattice relaxation time. This review starts with an introduction into the basic concepts of NMR followed by a description of the important aspects of a pulsed NMR expt. Thereafter, information obtained by an NMR expt. is addressed. In the subsequent main part, selected recent NMR studies (published roughly after the year 2000) of materials for spintronic applications are presented including NMR studies of, for example, Co thin films, Heusler compds., double perovskites and pyrites.
Original languageEnglish
Pages (from-to)173002-1/27
Number of pages27
JournalJournal of Physics D: Applied Physics
Volume41
Issue number17
DOIs
Publication statusPublished - 2008

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