Your age in bonds is too conservative. 10%-40% is generally the optimal range. Perhaps start at 10% now and then build to 40% over the next 15 years, then work back to 20% over the 10 years after you retire. Especially in an IRA where you are keeping the money you won't use for a long time, bonds don't seem as useful to me at this point.
SWAGX is Schwab's new generic bond fund. There are more options in ETF's, but not all of them are good, you would need to do some research. CD's are another option, it looks Schwab has brokered CD's at 2.5% which is similar to the bond fund (but Vanguard has CD's at 2.688%).