Experimental Study of the Host NMR Linewidth and Spin-Lattice Relaxation Rate in DiluteAlloys below the Kondo Temperature
- 1 May 1972
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 5 (9), 3421-3441
- https://doi.org/10.1103/physrevb.5.3421
Abstract
In order to determine the properties of single magnetic impurities in the Kondo state and the effects of these single magnetic impurities on the host-conduction-electron spin system, the Fe-impurity contributions to the -host nuclear-magnetic-resonance (NMR) linewidth , and spin-lattice relaxation time , have been studied over a wide Fe-concentration range ( ppm) in . The NMR-linewidth measurements made from 1.65 to 77°K and in magnetic fields from 2 to 16 kOe and in some cases up to 60 kOe, show the anomalous behavior of the slope originally observed by Heeger et al. and studied for a 480-ppm alloy by Golibersuch and Heeger exists over a wide Fe-concentration range. This anomalous behavior, which consists of the transition from a constant slope at low fields, , to a smaller magnitude slope at high fields, , occurs in a relatively narrow range of fields about some critical field . This behavior clearly results from the single-impurity contribution to the NMR linewidth as evidenced by the linear concentration dependence of both and and also by the concentration independence of . has the same temperature dependence as the bulk susceptibility, while is enhanced for and °K. At 1. 65 °K, , ( in ppm), and . These results show that the Ruderman-Kittel-Kasuya-Yosida-like oscillatory conduction-electron spin polarization existing about an impurity for is either enhanced for and
Keywords
This publication has 27 references indexed in Scilit:
- Single-Impurity and Interaction Effect on the Host NMR Linewidth ofCuFein the Kondo StatePhysical Review Letters, 1971
- Nuclear spin-lattice relaxation rates of 63Cu in dilutePhysics Letters A, 1971
- One-Impurity and Interaction Effects on the Cu:Fe MagnetizationPhysical Review Letters, 1970
- Susceptibility ofSolid State Communications, 1970
- The conduction electron spin distribution around Fe impurities in Cu for T < TkSolid State Communications, 1970
- Experimental Study of the Low-Temperature Spin Correlations in the Magnetic-Impurity ProblemPhysical Review B, 1969
- Ground State of the Magnetic Impurity Problem; Nuclear-Magnetic-Resonance Studies of Dilute Copper AlloysPhysical Review B, 1968
- Magnetic susceptibility of very dilute CuFe and AuFe alloys in the range 6–300°KJournal of Physics and Chemistry of Solids, 1967
- Observation of Nagaoka's Bound State for Conduction Electrons in Dilute Magnetic AlloysPhysical Review Letters, 1967
- Nuclear Magnetic Resonance in Dilute Copper Alloys at Low Temperatures, I. Experimental AspectsJournal of the Physics Society Japan, 1959