Abstract
The high-frequency magnetic force microscopy (HF-MFM) technique has been employed for the measurement of stray fields emanating from traditional longitudinal write heads. Here, we show that it is also possible to apply the HF-MFM technique to perpendicular write heads. The situation is different in so far, that there is no magnetic flux between two poles. In contrast, there is only one pole and the flux closure is obtained in combination with the writing medium. An ac current of 50 mA with a carrier frequency ranging between 200 MHz and 2 GHz fed in into the write head causes an observable contrast in the HF-MFM image. Not only the write pole itself but also the magnetic shielding around the pole are strongly influenced by the HF-current.
| Original language | English |
|---|---|
| Article number | 112004 |
| Journal | Journal of Physics: Conference Series |
| Volume | 200 |
| Issue number | SECTION 11 |
| DOIs | |
| Publication status | Published - 2010 Jan 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
HF-MFM imaging of stray fields from perpendicular write heads. / Koblischka, Michael Rudolf; Pfeifer, R.; Cazacu, A.; Lamberton, R.; Hartmann, U.
In: Journal of Physics: Conference Series, Vol. 200, No. SECTION 11, 112004, 01.01.2010.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - HF-MFM imaging of stray fields from perpendicular write heads
AU - Koblischka, Michael Rudolf
AU - Pfeifer, R.
AU - Cazacu, A.
AU - Lamberton, R.
AU - Hartmann, U.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - The high-frequency magnetic force microscopy (HF-MFM) technique has been employed for the measurement of stray fields emanating from traditional longitudinal write heads. Here, we show that it is also possible to apply the HF-MFM technique to perpendicular write heads. The situation is different in so far, that there is no magnetic flux between two poles. In contrast, there is only one pole and the flux closure is obtained in combination with the writing medium. An ac current of 50 mA with a carrier frequency ranging between 200 MHz and 2 GHz fed in into the write head causes an observable contrast in the HF-MFM image. Not only the write pole itself but also the magnetic shielding around the pole are strongly influenced by the HF-current.
AB - The high-frequency magnetic force microscopy (HF-MFM) technique has been employed for the measurement of stray fields emanating from traditional longitudinal write heads. Here, we show that it is also possible to apply the HF-MFM technique to perpendicular write heads. The situation is different in so far, that there is no magnetic flux between two poles. In contrast, there is only one pole and the flux closure is obtained in combination with the writing medium. An ac current of 50 mA with a carrier frequency ranging between 200 MHz and 2 GHz fed in into the write head causes an observable contrast in the HF-MFM image. Not only the write pole itself but also the magnetic shielding around the pole are strongly influenced by the HF-current.
UR - http://www.scopus.com/inward/record.url?scp=77957025274&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77957025274&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/200/11/112004
DO - 10.1088/1742-6596/200/11/112004
M3 - Conference article
AN - SCOPUS:77957025274
VL - 200
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - SECTION 11
M1 - 112004
ER -