MOKE RESULTS JM16 100 micron square pads 50nm Ni/ C10-dithiol / 20nm Co Line scan across Pad5...

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MOKE RESULTS JM16 100 micron square pads 50nm Ni/ C10-dithiol / 20nm Co Line scan across Pad5 05-17-09

Transcript of MOKE RESULTS JM16 100 micron square pads 50nm Ni/ C10-dithiol / 20nm Co Line scan across Pad5...

Page 1: MOKE RESULTS JM16 100 micron square pads 50nm Ni/ C10-dithiol / 20nm Co Line scan across Pad5 05-17-09.

MOKE RESULTS

JM16

100 micron square pads 50nm Ni/ C10-dithiol / 20nm Co

Line scan across Pad5

05-17-09

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JM16

X Data

0 1000 2000 3000 4000 5000 6000 7000

Y D

ata

0

1000

2000

3000

4000

5000

6000

7000

5.0 5.5 6.0 6.5 7.0 7.5

Scans on this pad

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2900 3000 3100 3200 3300 3400

21.2

21.4

21.6

21.8

22.05

10

15

20

9.0

9.2

9.4

9.6

9.8

6

7

8

6

7

8

2900 3000 3100 3200 3300 3400

Coe

rciv

ity

X position

1w s

at

2w s

at

outp

ut D

C

line

scan

DC

Y = 3070

7-point MOKEline scan

High-res. DCline scan

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-200 -100 0 100 200

-10

0

10

1

-200 -100 0 100 200

-10

0

10

2

-200 -100 0 100 200

-10

0

10

3

-200 -100 0 100 200

-10

0

10

4

-200 -100 0 100 200

-10

0

10

5

-200 -100 0 100 200

-10

0

10

6

-200 -100 0 100 200

-10

0

10

7

2 plots

File reference: 050409-JM16-TenmaDirect-pad5line-R-10

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-200 -100 0 100 200

-20

0

20

1

-200 -100 0 100 200

-20

0

20

2

-200 -100 0 100 200

-20

0

20

3

-200 -100 0 100 200

-20

0

20

4

-200 -100 0 100 200

-20

0

20

5

-200 -100 0 100 200

-20

0

20

6

-200 -100 0 100 200

-20

0

20

7

1 plots

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-200 -150 -100 -50 0 50 100 150 200-30

-20

-10

0

10

20

30

1w/in

put

H (Oe)

down on pad up on pad down off pad up off pad

1w comparison – on the pad vs. off the pad

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Observations

• Output DC intensity and 1ω signal show clear reductions on the pad. However, 2ω signal is barely changed (it has increased noise on the pad). Coercivity shows no change.

• These results are consistent with ferromagnetic coupling of the two layers.

• Still need to explain why the 1ω shows a larger change than the 2ω.

• A total of 10 pads were looked at on this sample. All showed similar behavior.

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Individual hysteresis loops

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“down” half of loop

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“up” half of loop

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