PT12 冠詞

従って、プラズモン発生部１６をε”値が小さい材料（例えばＡｇ）から構成すると、表面プラズモンの伝播のロスが小さくなり、熱アシスト磁気ヘッド１自体の温度上昇が抑えられるので好ましい。

Therefore, when the plasmon generator 16 is configured with a material with small value ε” (for example, Ag), the propagation loss of the surface plasmon becomes reduced and the temperature increase of the thermally-assisted magnetic head 1 itself is suppressed, which is preferable.

Therefore, when the plasmon generator 16 is configured with a material with a small value ε” (for example, Ag), the propagation loss of the surface plasmon becomes reduced and the temperature increase of the thermally-assisted magnetic head 1 itself is suppressed, which is preferable.