Electric field effect of magnetism in Pd and Pt

1Current Research – Electric field effect of magnetism in Pd and Pt

Ferromagnetic Ferromagnetic Ferromagnetic Diamagnetic

Periodic table of elements

If we can take out an electron from copper, can we create ferromagnetic copper?

This is a fundamental question which expands our understandings of materials

Current Research – Electric field effect of magnetism in Pd and Pt

2

We decided to test if we can change the magnetic properties of Pd and Pt, because we expected it would be easier

or Pd

Here’s a typical sample structure;

Through the electric field effect, electron density modulation is realized at the uppermost layer of Pt

3Current Research – Electric field effect of magnetism in Pd and Pt

Results

0 50 100 150 2000

1

2

3

4

5

5 10 15 20 25 30 354.04.14.24.34.44.5

100 105 110 115 1200.0

0.5

1.0

1.5

2.0

2.5

+3 V -2 Vm

/S

[10

-10 T·

m]

T [K]

Remanent magnetic moment Remanent magnetic moment

Pd Pt

Magnetic moment in Pd can be changed, but Pt cannot

Techniques and skills• IT

Microsoft Office Suite, Origin• Programming

LabVIEW• Techniques

Sputtering, wiring, etc.• Equipment

SMU (source measurement unit), MPMS, PPMS, AFM, etc.

4Current Research – Electric field effect of magnetism in Pd and Pt