High Frequency Characteristics of Synthetic Antiferromagnetic Coupling FeCoN Sandwich Films

Zhang, Luran; Zhang, Wenhui; Liu, Xi; Wang, Ying; Bai, Junfeng; Wei, Dan; Wei, Fulin

doi:10.1109/tmag.2011.2153184

Cited by 5 publications

(6 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From Fig.1(c) and Fig.1(d) we can conclude that the induced anisotrpy field H k of sample prepared by layer-by-layer mode is higher than sample prepared by continuous mode. This result agrees with the SAF layers' result, because the effective anisotropy field H k relates to the exchange coupling field H ex in SAF sandwich films [5]. It is well known that the interlayer coupling of samples grown by MBE is larger than that grown by sputtering, because of the larger surface intermixing in the sputtered samples due to the substrate bombardment by neutral atoms.…”

Section: A Magnetic Properties Of Saf Multilayers Prepared By Two Spsupporting

confidence: 88%

“…Synthetic antiferromagnetic (SAF) multilayers [1] show promise as soft underlayers for perpendicular recording media [2, 3], high moment write head material [4], high frequency application [5] and magnetic tunnel junctions [6,7]. SAF multilayers are comprised of two ferromagnetic layers separated by a nonmagnetic metallic spacer layer in which the ferromagnetic layers are coupled through antiferromagnetic interlayer exchange.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetization Reversal Process Study in Exchange Coupled Synthetic Antiferromagnetic Multilayers and Patterned Structures

Liu

Ishio

2015

IEEE Trans. Magn.

Self Cite

View full text Add to dashboard Cite

FeCo/Ru/FeCo exchange coupled synthetic antiferromagnetic multilayers were prepared with two sputtering modes. One is continuous sputtering mode, and the other is layer-by-layer sputtering mode. The former mode implies that the growth of entire FeCo layer has no intervals; while the latter implies that the growth of entire FeCo has many intervals. It is found that the exchange coupling filed H ex of sample sputtered by layer-by-layer mode is higher than the one sputtered by continuous mode.Magnetic properties of samples deposited by layer-by-layer mode were studied versus sputtering power. we can conclude that the bilinear exchange constant increases and the biquadratic exchange constant decreases with the increase of the sputtering power.The magnetization reversal process was studied by the MFM measurement. We can get that the magnetization reversal process is a domain wall move process. When the applied field is smaller than H ex, both the two magnetic layers have same domain structure and the domain structure of the two layers are reverse correspondingly. It is also found that when the applied field is smaller than H ex and changing the domain wall of the two layers move correspondingly at the same time. From MFM measurement of exchanging coupling square elements we can conclude that the single domain size of SAF multilayers is larger than 5μm when the applied magnetic field is smaller than the H ex. 0018-9464 (c) Index Terms-Magnetic domains, Magnetic force microscopy, Magnetization reversal, Synthetic antiferromagnetic multilayers

show abstract

Section: A Magnetic Properties Of Saf Multilayers Prepared By Two Spsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Magnetization Reversal Process Study in Exchange Coupled Synthetic Antiferromagnetic Multilayers and Patterned Structures

Liu

Ishio

2015

IEEE Trans. Magn.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The saturating field for SAF1 is around 5 kOe, while for SAF2 it is around 6.5 kOe. This is significantly greater than the approximate value of 2 kOe reported in previous works [21], leading to the conclusion that these samples also display large interlayer coupling strengths (J IEC ), and demonstrate a high H ex [41].…”

Section: Static Magnetic Propertiesmentioning

confidence: 54%

“…In recent works, notable enhancements to the f r frequency were demonstrated by Li et al [37] who reported a zero-field optic mode resonance of 11.32 GHz. Further, SAFs fabricated using a range of ferromagnetic components have been explored including Ni-Fe [38], Co [39,40] and (Fe,Co)N [41]. Additionally, ferromagnetic components created from highly spin-polarized Heusler alloys such as Co 2 FeAl have been reported [42].…”

Section: Introductionmentioning

confidence: 99%

Zero-field Optic Mode Beyond 20 GHz in a Synthetic Antiferromagnet

et al. 2020

View full text Add to dashboard Cite

Antiferromagnets have considerable potential as spintronic materials. Their dynamic properties include resonant modes at frequencies higher than can be observed in conventional ferromagnetic materials. An alternative to single-phase antiferromagnets are synthetic antiferromagnets (SAFs), engineered structures of exchange-coupled ferromagnet/nonmagnet/ferromagnet trilayers. SAFs have significant advantages due to the wide-ranging tunability of their magnetic properties and inherent compatibility with current device technologies, such as those used for Spin-transfer-torque magnetic random-access memory production. Here we report the dynamic properties of fully compensated SAFs using broadband ferromagnetic resonance and demonstrate resonant optic modes in addition to the conventional acoustic (Kittel) mode. These optic modes possess the highest zero-field frequencies observed in SAFs to date with resonances of 18 and 21 GHz at the first and second peaks in antiferromagnetic Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling, respectively. In contrast to previous SAF reports that focus only on the first RKKY antiferromagnetic coupling peak, we show that a higher optic mode frequency is obtained for the second antiferromagnetic coupling peak. We ascribe this to the smoother interfaces associated with a thicker nonmagnetic layer. This demonstrates the importance of interface quality to achieving high-frequency optic mode dynamics entering the subterahertz range.

show abstract

“…In an ideal situation with proper thickness of nonmagnetic layer and low structural defects, no remanence can be observed in easy axis and the total magnetization becomes zero when the applied magnetic field is smaller than exchange coupling field ex . In recent years, there have been many studies on SAF multilayers, as it shows great promise as soft underlayers for perpendicular recording media [4,5], high moment write head material [6], and high frequency application [7]. But the reversal process in FeCo/Ru/FeCo SAF multilayers has not been studied yet.…”

Section: Introductionmentioning

confidence: 99%

Study of Magnetization Reversal Process in FeCo/Ru/FeCo Exchange Coupled Synthetic Antiferromagnetic Multilayers

Liu

Ishio

2015

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

FeCo/Ru/FeCo exchange coupled synthetic antiferromagnetic multilayers were prepared with two sputtering modes. One is continuous sputtering mode, and the other mode is layer-by-layer sputtering mode. The former mode implies that substrate faced the target and film growth process was continuous when FeCo layers were sputtering, whereas the latter implies that substrate was rotating with the mask at a speed of 5 rpm when FeCo layers were sputtering. It was found that the exchange coupling fieldHexof sample sputtered by layer-by-layer mode was higher than the one sputtered by continuous mode. Domain structures were measured with applying varied in-plane magnetic fields along the easy axis in order to study the magnetization reversal process. We found it is a domain wall move process. When the applied field is smaller thanHex, both the two magnetic layers have domain structure and the domain structure of the two layers is reversed correspondingly. When the applied field is varying in the range of-HextoHex, the domain wall of the two layers moves correspondingly at the same time.

show abstract

High Frequency Characteristics of Synthetic Antiferromagnetic Coupling FeCoN Sandwich Films

Cited by 5 publications

References 16 publications

Magnetization Reversal Process Study in Exchange Coupled Synthetic Antiferromagnetic Multilayers and Patterned Structures

Magnetization Reversal Process Study in Exchange Coupled Synthetic Antiferromagnetic Multilayers and Patterned Structures

Zero-field Optic Mode Beyond 20 GHz in a Synthetic Antiferromagnet

Study of Magnetization Reversal Process in FeCo/Ru/FeCo Exchange Coupled Synthetic Antiferromagnetic Multilayers

Contact Info

Product

Resources

About