TY - JOUR
T1 - Electron spin resonance of the itinerant magnets ZrZn2 and Nb1-yFe2+y
T2 - A comparison
AU - Förster, T.
AU - Sichelschmidt, J.
AU - Grüner, D.
AU - Brando, M.
AU - Kimura, N.
AU - Steglich, F.
PY - 2010
Y1 - 2010
N2 - The two Laves phase compounds ZrZn2 and NbFe2 belong to the small group of low temperature itinerant magnets. While ZrZn2 shows a ferromagnetic (FM) transition with a small ordered moment, Nb 1-yFe2+y exhibits a magnetically ordered ground state which is believed to be of spin-density-wave type for |y| < 0.015 and FM for y ≥ 0.02. Furthermore, signatures of a logarithmic Fermi-liquid breakdown suggest the existence of a quantum critical point on the Nb-rich side at y ≈ -0.015. In both systems a largely enhanced Stoner factor indicates the presence of FM correlations, which, in general, support the observability of a conduction electron spin resonance (ESR). We present our results of ESR measurements on high quality ZrZn2 single crystals and on polycrystalline samples of Nb 1-yFe2+y. The ESR data of both compounds is analysed in terms of a conduction ESR being subject to strong exchange enhancement effects.
AB - The two Laves phase compounds ZrZn2 and NbFe2 belong to the small group of low temperature itinerant magnets. While ZrZn2 shows a ferromagnetic (FM) transition with a small ordered moment, Nb 1-yFe2+y exhibits a magnetically ordered ground state which is believed to be of spin-density-wave type for |y| < 0.015 and FM for y ≥ 0.02. Furthermore, signatures of a logarithmic Fermi-liquid breakdown suggest the existence of a quantum critical point on the Nb-rich side at y ≈ -0.015. In both systems a largely enhanced Stoner factor indicates the presence of FM correlations, which, in general, support the observability of a conduction electron spin resonance (ESR). We present our results of ESR measurements on high quality ZrZn2 single crystals and on polycrystalline samples of Nb 1-yFe2+y. The ESR data of both compounds is analysed in terms of a conduction ESR being subject to strong exchange enhancement effects.
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U2 - 10.1088/1742-6596/200/1/012035
DO - 10.1088/1742-6596/200/1/012035
M3 - Conference article
AN - SCOPUS:77957034560
VL - 200
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - SECTION 1
M1 - 012035
ER -