AIP Publishing LLC retracts this erratum because it was submitted and published without the knowledge of all the co-authors. Upon further investigation, it was found that the article that this erratum addressed warranted a retraction. Please also see the Retraction1 associated with the original article.

1.
R. K.
Singhal
et al,
J. Appl. Phys.
114
,
129902
(
2013
).