Pinning effect and thermal stability study in L 10 FePt-pinned spin valves

Hui Zhao; Zongzhi Zhang; Bin Ma; Q. Y. Jin

doi:10.1063/1.2752101

Pinning effect and thermal stability study in L 10 FePt-pinned spin valves

Hui Zhao, Zongzhi Zhang, Bin Ma, Q. Y. Jin

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

L 10 -ordered FePt alloy is introduced into the synthetic antiferromagnetically coupled spin valves as an exchange pinning layer. Large switching field of 1824 Oe for the reference layer and a high giant magnetoresistance (GMR) ratio of 7.0% are observed in such FePt-pinned spin valves, which are comparable to those in MnIr-pinned samples with similar structures. However, the GMR ratio in FePt-pinned spin valve exhibits a poor thermal stability. The rough surface of the FePt layer causes the atoms to interdiffuse easily at lower temperature, resulting in some FePt formation in the CoFe reference layer. This magnetic isotropic FePt alloy with (111) texture could degrade the uniaxial anisotropy of the reference layer, leading to the reduction of GMR ratio.

Original language	English (US)
Article number	023909
Journal	Journal of Applied Physics
Volume	102
Issue number	2
DOIs	https://doi.org/10.1063/1.2752101
State	Published - 2007

Bibliographical note

Funding Information:
This work was supported by the National Nature Science Foundation of China (Grant Nos. 10604016, 10374019, 60490290, and 60678008) and grants from the Science and Technology Committee of Shanghai (Nos. 05PJ14016 and 06DJ14007). The authors thank Professor Shiming Zhou in Physics Department of Fudan University for the VSM measurements.

Access

10.1063/1.2752101

OpenUrl availability

Full text

Cite this

@article{fa3d012eef704885bed66a1e9284127b,

title = "Pinning effect and thermal stability study in L 10 FePt-pinned spin valves",

abstract = "L 10 -ordered FePt alloy is introduced into the synthetic antiferromagnetically coupled spin valves as an exchange pinning layer. Large switching field of 1824 Oe for the reference layer and a high giant magnetoresistance (GMR) ratio of 7.0% are observed in such FePt-pinned spin valves, which are comparable to those in MnIr-pinned samples with similar structures. However, the GMR ratio in FePt-pinned spin valve exhibits a poor thermal stability. The rough surface of the FePt layer causes the atoms to interdiffuse easily at lower temperature, resulting in some FePt formation in the CoFe reference layer. This magnetic isotropic FePt alloy with (111) texture could degrade the uniaxial anisotropy of the reference layer, leading to the reduction of GMR ratio.",

author = "Hui Zhao and Zongzhi Zhang and Bin Ma and Jin, {Q. Y.}",

note = "Funding Information: This work was supported by the National Nature Science Foundation of China (Grant Nos. 10604016, 10374019, 60490290, and 60678008) and grants from the Science and Technology Committee of Shanghai (Nos. 05PJ14016 and 06DJ14007). The authors thank Professor Shiming Zhou in Physics Department of Fudan University for the VSM measurements.",

year = "2007",

doi = "10.1063/1.2752101",

language = "English (US)",

volume = "102",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "2",

}

TY - JOUR

T1 - Pinning effect and thermal stability study in L 10 FePt-pinned spin valves

AU - Zhao, Hui

AU - Zhang, Zongzhi

AU - Ma, Bin

AU - Jin, Q. Y.

N1 - Funding Information: This work was supported by the National Nature Science Foundation of China (Grant Nos. 10604016, 10374019, 60490290, and 60678008) and grants from the Science and Technology Committee of Shanghai (Nos. 05PJ14016 and 06DJ14007). The authors thank Professor Shiming Zhou in Physics Department of Fudan University for the VSM measurements.

PY - 2007

Y1 - 2007

N2 - L 10 -ordered FePt alloy is introduced into the synthetic antiferromagnetically coupled spin valves as an exchange pinning layer. Large switching field of 1824 Oe for the reference layer and a high giant magnetoresistance (GMR) ratio of 7.0% are observed in such FePt-pinned spin valves, which are comparable to those in MnIr-pinned samples with similar structures. However, the GMR ratio in FePt-pinned spin valve exhibits a poor thermal stability. The rough surface of the FePt layer causes the atoms to interdiffuse easily at lower temperature, resulting in some FePt formation in the CoFe reference layer. This magnetic isotropic FePt alloy with (111) texture could degrade the uniaxial anisotropy of the reference layer, leading to the reduction of GMR ratio.

AB - L 10 -ordered FePt alloy is introduced into the synthetic antiferromagnetically coupled spin valves as an exchange pinning layer. Large switching field of 1824 Oe for the reference layer and a high giant magnetoresistance (GMR) ratio of 7.0% are observed in such FePt-pinned spin valves, which are comparable to those in MnIr-pinned samples with similar structures. However, the GMR ratio in FePt-pinned spin valve exhibits a poor thermal stability. The rough surface of the FePt layer causes the atoms to interdiffuse easily at lower temperature, resulting in some FePt formation in the CoFe reference layer. This magnetic isotropic FePt alloy with (111) texture could degrade the uniaxial anisotropy of the reference layer, leading to the reduction of GMR ratio.

UR - http://www.scopus.com/inward/record.url?scp=34547585380&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34547585380&partnerID=8YFLogxK

U2 - 10.1063/1.2752101

DO - 10.1063/1.2752101

M3 - Article

AN - SCOPUS:34547585380

SN - 0021-8979

VL - 102

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 2

M1 - 023909

ER -

Pinning effect and thermal stability study in L 10 FePt-pinned spin valves

Abstract

Bibliographical note

Access

OpenUrl availability

Other files and links

Fingerprint

Cite this