JP7140294B2 - 磁気記録アレイ及びリザボア素子 - Google Patents
磁気記録アレイ及びリザボア素子 Download PDFInfo
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Description
Access Memory)、ReRAM(Resistance Randome
Access Memory)、PCRAM(Phase Change Random Access Memory)等が次世代の不揮発性メモリとして知られている。
図1は、第1実施形態に係る磁気記録アレイ200の構成図である。磁気記録アレイ200は、複数の磁気抵抗効果素子100と、複数の書き込み配線Wp1~Wpnと、複数の共通配線Cm1~Cmnと、複数の読み出し配線Rp1~Rpnと、複数の第1スイッチング素子110と、複数の第2スイッチング素子120と、複数の第3スイッチング素子130と、を備える。磁気記録アレイ200は、例えば、磁気メモリ等に利用できる。磁気抵抗効果素子100は、スピン素子の一例である。
図6は、第2実施形態に係る磁化回転素子101の断面図である。図6は、配線20のy方向の幅の中心を通るxz平面で磁化回転素子101を切断した断面である。第2実施形態に係る磁化回転素子101は、非磁性層3及び第2強磁性層2を有さない点が、第1実施形態に係る磁気抵抗効果素子100と異なる。その他の構成は、第1実施形態に係る磁気抵抗効果素子100と同様であり、説明を省く。
図7は、第3実施形態に係る磁気抵抗効果素子102の断面図である。図7は、配線21のy方向の幅の中心を通るxz平面で磁気抵抗効果素子102を切断した断面である。磁気抵抗効果素子102は、積層体11が配線21に近い側から非磁性層5及び第1強磁性層4からなる点が、磁気抵抗効果素子100と異なる。磁気抵抗効果素子100と同様の構成は、同様の符号を付し、説明を省く。
図8は、第4実施形態に係るリザボア素子103の斜視図である。リザボア素子103は、複数の磁化回転素子101と、複数の磁化回転素子101の第1強磁性層1の間を繋ぐスピン伝導層70と、を備える。スピン伝導層70は、例えば、非磁性の導電体からなる。スピン伝導層70は、第1強磁性層1から染みだしたスピン流を伝播する。
2 第2強磁性層
3,5 非磁性層
10,11 積層体
20,21 配線
20a 第1面
20b 第2面
21A 第1磁区
21B 第2磁区
30 第1導電部
40 第2導電部
70 スピン伝導層
90,91,92 絶縁層
100,102 磁気抵抗効果素子
101 磁化回転素子
103 リザボア素子
110 第1スイッチング素子
120 第2スイッチング素子
130 第3スイッチング素子
140 共有スイッチング素子
200、201 磁気記録アレイ
C1,C2,C3,C4 中心
Cm1~Cmn 共通配線
Cw 導電部
D ドレイン
E 導電層
G ゲート電極
GI ゲート絶縁膜
Rp1~Rpn 読み出し配線
S ソース
Sub 基板
Tr トランジスタ
Wp1~Wpn 書き込み配線
Claims (19)
- 配線と、前記配線に積層された第1強磁性層を含む積層体とをそれぞれ備え、行列状に配列した複数のスピン素子と、
前記複数のスピン素子のそれぞれの前記配線の第1端に接続された複数の書き込み配線と、
前記複数のスピン素子のそれぞれの前記積層体に接続された複数の読み出し配線と、
同じ列に属するそれぞれのスピン素子の前記配線の第2端に接続された複数の共通配線と、を備え、
前記共通配線は、電気抵抗が前記書き込み配線又は前記読み出し配線より低い、磁気記録アレイ。 - 前記共通配線は、電気抵抗が前記書き込み配線及び前記読み出し配線より低く、前記書き込み配線は、電気抵抗が前記読み出し配線より低い、請求項1に記載の磁気記録アレイ。
- 前記共通配線は、電気抵抗が前記書き込み配線及び前記読み出し配線より低く、前記読み出し配線は、電気抵抗が前記書き込み配線より低い、請求項1に記載の磁気記録アレイ。
- 前記共通配線は、電流の印加方向に対する断面積が前記書き込み配線又は前記読み出し配線より大きい、請求項1に記載の磁気記録アレイ。
- 前記共通配線は、前記電流の印加方向に対する断面積が前記書き込み配線及び前記読み出し配線より大きく、前記書き込み配線は、前記電流の印加方向に対する断面積が前記読み出し配線より大きい、請求項4に記載の磁気記録アレイ。
- 前記共通配線は、前記電流の印加方向に対する断面積が前記書き込み配線及び前記読み出し配線より大きく、前記読み出し配線は、前記電流の印加方向に対する断面積が前記書き込み配線より大きい、請求項4に記載の磁気記録アレイ。
- 前記共通配線は、電気抵抗率が前記書き込み配線又は前記読み出し配線より低い、請求項1に記載の磁気記録アレイ。
- 前記共通配線は、電気抵抗率が前記書き込み配線及び前記読み出し配線より低く、前記書き込み配線は、電気抵抗率が前記読み出し配線より低い、請求項7に記載の磁気記録アレイ。
- 前記共通配線は、電気抵抗率が前記書き込み配線及び前記読み出し配線より低く、前記読み出し配線は、電気抵抗率が前記書き込み配線より低い、請求項7に記載の磁気記録アレイ。
- 配線と、前記配線に積層された第1強磁性層を含む積層体とをそれぞれ備え、行列状に配列した複数のスピン素子と、
前記複数のスピン素子のそれぞれの前記配線の第1端に接続された複数の書き込み配線と、
前記複数のスピン素子のそれぞれの前記積層体に接続された複数の読み出し配線と、
同じ列に属するそれぞれのスピン素子の前記配線の第2端に接続された複数の共通配線と、を備え、
前記共通配線は、活性化エネルギーが前記書き込み配線又は前記読み出し配線より高い、磁気記録アレイ。 - 前記共通配線は、活性化エネルギーが前記書き込み配線及び前記読み出し配線より高く、前記書き込み配線は、活性化エネルギーが前記読み出し配線より高い、請求項10に記載の磁気記録アレイ。
- 前記共通配線は、活性化エネルギーが前記書き込み配線及び前記読み出し配線より高く、前記読み出し配線は、活性化エネルギーが前記書き込み配線より高い、請求項10に記載の磁気記録アレイ。
- 前記共通配線は、活性化エネルギーが300kJ/mol以上である材料を含む、請求項10~12のいずれか1項に記載の磁気記録アレイ。
- 前記共通配線は、Si、Ti、Cr、Ta、W及びIrからなる群より選択される少なくとも一種の金属を含む、請求項10~13のいずれか1項に記載の磁気記録アレイ。
- 前記書き込み配線は一方向に延在し、前記読み出し配線は前記一方向と異なる方向に延在し、前記共通配線は前記書き込み配線の延在方向及び前記読み出し配線の延在方向と異なる方向に延在している、請求項1~14のいずれか1項に記載の磁気記録アレイ。
- 前記スピン素子の前記配線と前記共通配線とが、制御素子を介して接続されている、請求項1~15のいずれか1項に記載の磁気記録アレイ。
- 前記配線は、電流が流れる際のスピンホール効果によってスピン流を発生させる機能を有する金属、合金、金属間化合物、金属硼化物、金属炭化物、金属珪化物、金属燐化物のいずれかである、請求項1~16のいずれか1項に記載の磁気記録アレイ。
- 前記積層体は、前記配線に近い側から非磁性層と前記第1強磁性層とを含み、
前記配線は、内部に磁壁を有することができる強磁性層である、請求項1~16のいずれか1項に記載の磁気記録アレイ。 - 請求項1~18のいずれか1項に記載の磁気記録アレイと、
複数の前記スピン素子の前記第1強磁性層を繋ぐスピン伝導層と、を備える、リザボア素子。
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