$^{75}$As and $^{59}$Co NMR studies of SrCo$_{2}$As$_{2}$

After the discovery of unconventional superconductivity in Fe pnictides with the ThCr$_{2}$Si$_{2}$-type structure, much attention has been paid to the related materials AM$_{2}$As$_{2}$(A $=$ Ca, Sr, and Ba, and M $=$ Co, Ni, Mn, and Cu). We have been studying the electronic and magnetic properties of these related materials systematically. Among them, metallic SrCo$_{2}$As$_{2}$ is an interesting system~[1] because inelastic neutron scattering measurements indicate strong stripe-type antiferromagnetic correlations [2], similar to the Fe pnictide superconductors. In order to investigate the magnetic and electronic properties of SrCo$_{2}$As$_{2}$ from a microscopic point of view, we carried out $^{59}$Co and $^{75}$As NMR in the temperature range T $=$ 1.3 -- 300 K. In this talk, based on $^{59}$Co NMR data including $^{75}$As NMR results published previously [1], we discuss the characteristic magnetic fluctuations in the system and compare them with those measured from NMR data for another cobalt arsenide BaCo$_{2}$As$_{2}$. \\[4pt] [1] A. Pandey, et al., Phys. Rev. B 88, 014526 (2013).\\[0pt] [2] W. Jayasekara, et al., Phys. Rev. Lett. 111, 157001 (2013).