Spin-current injection and detection in κ-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br

Journal Article · Fri May 15 04:00:00 EDT 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4922007· OSTI ID:22488596

Hou, D. ^[1]; Uruichi, M. ^[2]; Uchida, K. ^[3]; Yamamoto, H. M. ^[2]; Saitoh, E. ^[1]

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1. WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
2. Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, Okazaki 444-8585 (Japan)
3. Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Aoba-ku, Sendai 980-8577 (Japan)

Spin-current injection into an organic semiconductor κ-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br film induced by the spin pumping from an yttrium iron garnet (YIG) film. When magnetization dynamics in the YIG film is excited by ferromagnetic or spin-wave resonance, a voltage signal was found to appear in the κ-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br film. Magnetic-field-angle dependence measurements indicate that the voltage signal is governed by the inverse spin Hall effect in κ-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br. We found that the voltage signal in the κ-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br/YIG system is critically suppressed around 80 K, around which magnetic and/or glass transitions occur, implying that the efficiency of the spin-current injection is suppressed by fluctuations which critically enhanced near the transitions.

• OSTI ID: 22488596
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 5 Vol. 5; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BEDT-TTF
CARBON NITRIDES
CYANIDES
DETECTION
EFFICIENCY
ELECTRIC POTENTIAL
FERRITE GARNETS
FILMS
HALL EFFECT
IRON OXIDES
MAGNETIC FIELDS
MAGNETIZATION
ORGANIC SEMICONDUCTORS
SIGNALS
SPIN
SPIN WAVES
YTTRIUM
YTTRIUM COMPOUNDS