Competing magnetic fluctuations in Sr3Ru2O7 probed by Ti doping
J. Hooper, M. H. Fang, M. Zhou, D. Fobes, N. Dang, Z. Q. Mao, C. M., Feng, Z. A. Xu, M. H. Yu, C. J. OConnor, G. J. Xu, N. Andersen, and M., Salamon
TL;DR
This study investigates how nonmagnetic Ti doping affects the magnetic and electronic properties of Sr3Ru2O7, revealing the suppression of magnetic fluctuations and the smearing of quantum phase transitions, thus highlighting competing magnetic interactions.
Contribution
It provides new experimental evidence for competing magnetic fluctuations in Sr3Ru2O7 and shows how Ti doping shifts the balance from antiferromagnetic to ferromagnetic fluctuations.
Findings
Ti doping suppresses magnetic susceptibility peak near 16 K
Ti doping smears out the metamagnetic quantum phase transition
Ti doping suppresses antiferromagnetic interactions from Fermi surface nesting
Abstract
We report the effect of nonmagnetic Ti4+ impurities on the electronic and magnetic properties of Sr3Ru2O7. Small amounts of Ti suppress the characteristic peak in magnetic susceptibility near 16 K and result in a sharp upturn in specific heat. The metamagnetic quantum phase transition and related anomalous features are quickly smeared out by small amounts of Ti. These results provide strong evidence for the existence of competing magnetic fluctuations in the ground state of Sr3Ru2O7. Ti doping suppresses the low temperature antiferromagnetic interactions that arise from Fermi surface nesting, leaving the system in a state dominated by ferromagnetic fluctuations.
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