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Journals / Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2026 / Cilt: 7 Sayı: 2

Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction

LSMO/STO/LSMO Manyetik Tünel Ekleminin Zayıf Manyetik Alanlarda Tünelleme Manyetodirenci

Ramazan Topkaya
Pages
125–130
Publication Date
2017-06-30
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The asymmetry of TMR curves was attributed to the ferromagnetic electrodes with different thickness and the differences in the electronic states of the upper and lower STO/LSMO interfaces

📌 3 Key Takeaways

🎯
Objective & Hypothesis:La 0.7 Sr 0.3 MnO 3 /SrTiO 3 /La 0.7 Sr 0.3 MnO 3 magnetic tunnel junction was grown on (001)-oriented SrTiO 3 substrate by using pulsed laser deposition technique.
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Key Findings & Data:La 0.7 Sr 0.3 MnO 3 (LSMO) was used as ferromagnetic (FM) electrodes and SrTiO 3 (STO) was used as a tunnel barrier.
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Conclusion & Impact:The asymmetry of TMR curves was attributed to the ferromagnetic electrodes with different thickness and the differences in the electronic states of the upper and lower STO/LSMO interfaces
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:La 0.7Sr0.3MnO3 · manyetik tünel eklemi · spintronik

Abstract

La 0.7 Sr 0.3 MnO 3 /SrTiO 3 /La 0.7 Sr 0.3 MnO 3 magnetic tunnel junction was grown on (001)-oriented SrTiO 3 substrate by using pulsed laser deposition technique. La 0.7 Sr 0.3 MnO 3 (LSMO) was used as ferromagnetic (FM) electrodes and SrTiO 3 (STO) was used as a tunnel barrier. The effect of temperature and magnetic feld on electrical transport properties has been investigated. Bottom electrode and junction resistances were observed to strongly depend on temperature. Large magnetoresistance of almost 300 % was observed at 77.3 K at low magnetic felds of a few tens of Oe. The large magnetoresistance was explained by the nearly half-metallic band structure of La 0.7 Sr 0.3 MnO 3 . The asymmetry of TMR curves was attributed to the ferromagnetic electrodes with different thickness and the differences in the electronic states of the upper and lower STO/LSMO interfaces

Özet

Darbeli lazer biriktirme tekniği kullanılarak La 0.7 Sr 0.3 MnO 3 /SrTiO 3 /La 0.7 Sr 0.3 MnO 3 manyetik tünel eklemi SrTiO 3 alttaş üzerinde büyütüldü. Ferromanyetik elektrot için La 0.7 Sr 0.3 MnO 3 (LSMO) ve tünelleme bariyeri için SrTiO 3 (STO) kullanıldı. Sıcaklığın ve manyetik alanın elektriksel özelliklere etkisi araştırıldı. Alt elektrot ve eklem dirençlerinin çok güçlü bir şekilde sıcaklığa bağlı olduğu gözlemlendi. 77.3 K sıcaklık ve zayıf manyetik alanlarda yaklaşık % 300’lük yüksek manyetodirenç gözlemlendi. Gözlemlenen yüksek manyetodirenç La 0.7 Sr 0.3 MnO 3 ’ün yarımetalik band yapısından kaynaklanır. TMR eğrilerinin asimetrik yapısı, farklı kalınlıktaki elektrotlar ile üst ve alt STO/LSMO ara yüzeylerin elektronik yapılarının farklılığına atfedildi

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Cite This Article

Topkaya, R. (2017). Tunnelling Magnetoresistance at Low Magnetic Fields in LSMO/STO/LSMO Magnetic Tunnel Junction. Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi, Cilt: 7 Sayı: 2, 125–130. https://ajindex.com/articles/1273015

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