The influence of nonmagnetic layer on undirectional anisotropy in trilayer system $\mathrm{Fe/Cu/CoO}$

Petr D. Kim ; Gennady S. Patrin ; Dmitry A. Marushchenko ; Igor А. Turpanov ; Ludmila A. Li

Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 5 (2012) no. 2, pp. 205-212.

Résumé

This paper considers the dependence exchange bias on the thickness of the intermediate layer of copper and temperature in polycrystalline thin films ferromagnet/nonmagnetic metal/antiferromagnet ($\mathrm{Fe/Cu/CoO}$). We have revealed oscillatory of exchange bias value in depending on the thickness of the copper layer. The oscillation of the most clearly manifested in a certain range of temperatures. For the first time by us detected the oscillation of the exchange bias with increasing temperature, these oscillations occur with a change of sign of the field exchange interaction.

Détail

Keywords: thin films, exchange interaction
Mots-clés : unidirectional anisotropy.

Bibliographie

[1] J. Nogues, I. K. Schuller, “Exchange bias”, J. Magn. Magn. Mater., 192 (1999), 203–232 | DOI

[2] W. H. Meikeljohn, C. P. Bean, “New magnetic anisotropy”, Phys. Rev., 102 (1956), 1413–1414 | DOI

[3] L. Thomas, A. J. Kellock, S. S. P. Parkin, “On the exchange biasing through a nonmagnetic spacer layer”, J. Appl. Phys., 87 (2000), 5061–5063 | DOI

[4] N. J. Gekemeijer, T. Ambrose, C. L. Chien, “Long-Range Exchange Bias across a Spacer Layer”, Phys. Rev. Lett., 79 (1997), 4270–4273 | DOI

[5] P. Grunberg, R. Schreider, Y. Pang et al., “Layered Magnetic Structures: Evidence for Antiferromagnetic Feupling of Fe Layers across Cr interlayers”, Phys. Rev. Lett., 57 (1986), 2442–2445 | DOI

[6] A. Cebollada, J. L. Martinez, J. M. Gallego et al., “Antiferromagnetic ordering in Fe-Cu single-crystal superlattices”, Phys. Rev. B, 39 (1989), 9726–9729 | DOI

[7] S. S. P. Parkin, N. More, K. P. Roche, “Oscillation in Exchange Feupling and Magnetoresistance in Metallic Superlattice Structures: Fe/Ru, Fe/Cr, and Fe/Cr”, Phys. Rev. Lett., 64 (1990), 2304–2307 | DOI

[8] P. Bruno, C. Chappert, “Oscillatory Feupling between Ferromagnetic Layers Separated by a Nonmagnetic Metal Spacer”, Phys. Rev. Lett., 67 (1991), 1602–1605 | DOI

[9] P. Bruno, C. Chappert, “Ruderman–Kittel theory of oscillatory interlayer exchange Feupling”, Phys. Rev. B, 46 (1992), 261–270 | DOI

[10] A. E. Berkowitz, K. Takano, “Exchange anisotropy a review”, J. Magn. Magn. Mater., 200 (1999), 552–570 | DOI

[11] M. Kiwi, “Exchange bias theory”, J. Magn. Magn. Mater., 234 (2001), 584–595 | DOI

[12] T. Mewes, B. F. P. Roos, S. O. Demokritov, B. Hillebrands, “Oscillatory exchange bias effect in FeNi/Cu/FeMn and FeNi/Cr/FeMn trilayer systems”, J. Appl. Phys., 87 (2000), 5064–5066 | DOI

[13] M. T. Lin, C. H. Ho, C. R. Chang, Y. D. Yao, “Thermally assisted oscillatory interlayer exchange bias Feupling”, Phys. Rev. B, 63 (2001), 100404(1)–100404(4) | DOI

[14] M. Gruyters, M. Gierlings, D. Riegel, “Rapid suppression of exchange bias across thin Au spacer layers”, Phys. Rev. B, 64 (2001), 132401(1)–132401(4) | DOI

[15] V. K. Valev, M. Gruyters, A. Kirilyuk, Th. Rasing, “Direct Observation of Exchange Bias Related UnFempensated Spins at the CoO/Cu Interface”, Phys. Rev. Lett., 96 (2006), 067206(1)–067206(4) | DOI

[16] J. W. Cai, W. Y. Lai, J. Teng et al., “Long-range oscillatory exchange interaction between antiferromagnetic FeMn layers across a Cu spacer”, Phys. Rev. B, 70 (2004), 214428(1)–214428(5) | DOI

[17] Y. G. Yoo, S. C. Yu, P. D. Kim et al., “The study of exchange Feupling in NiFe/Cu/IrMn trilayer structures by MOKE and FMR measurements”, J. Magn. Magn. Maters., 304 (2006), e62–e64 | DOI

[18] J. Geshev, S. NiFelodi, L. G. Pereira et al., “Exchange bias through a Cu interlayer in an IrMn/Fe system”, Phys. Rev. B, 75 (2007), 214402(1)–214402(5) | DOI

[19] M. Ali, P. Adie, C. H. Marrows et al., “Exchange bias using a spin glass”, Nature Materials, 6 (2007), 70–75 | DOI

[20] T. Gredig, I. N. Krivorotov et al., “Unidirectional coercivity enhancement in exchange-biased Co/CoO”, Appl. Phys. Lett., 81 (2002), 1270–1272 | DOI

[21] O. G. Shpyrko, E. D. Isaacs, J. M. Logan et al., “Direct measurement of antiferromagnetic domain fluctuations”, Nature, 447 (2007), 68–71 | DOI

[22] Y. J. Lee, Ch. R. Chang et al., “Theoretical studies of oscillatory behavior for long-range exchange bias”, J. Magn. Magn. Maters., 239 (2002), 57–59 | DOI

[23] Y. J. Lee, Ch. R. Chang et al., “Long-range exchange bias through a metal spacer”, J. Magn. Magn. Maters., 240 (2002), 264–266 | DOI

[24] J. J. D. Miguel, A. Cebollada, J. M. Gallego et al., “Neutron-diffraction study on the field dependent magnetic ordering in Co-Cu superlattices”, J. Magn. Magn. Mater., 93 (1991), 89–94 | DOI

[25] F. Petroff, A. Barthelemy, D. H. Mosca et al., “Oscillatory interlayer exchange and magnetoresistance in Fe/Cu multilayers”, Phys. Rev. B, 44 (1991), 5355–5357 | DOI

[26] S. S. P. Parkin, Z. G. Li, D. J. Smith, “Giant magnetoresistance in antiferromagnetic Co/Cu multilayers”, Appl. Phys. Lett., 58 (1991), 2710–2712 | DOI

[27] S. Demokritov, E. Tsymbal, P. Grunberg, W. Zinn, I. K. Schuller, “Magnetic-dipole mechanism for biquadratic interlayer coupling”, Phys. Rev. B, 49 (1994), 720–723 | DOI

[28] D. Altbir, M. Kiwi, R. Ramirez, I. K. Schuller, “The Dipolar Interaction and Its Interplay with Interface Roughness”, J. Magn.Magn. Mater., 149 (1995), L246–L250 | DOI

[29] D. Altbir, J. d. A. e. Castro, P. Vargas, “Magnetic coupling in metallic granular systems”, Phys. Rev. B, 54 (1996), R6823–R6826 | DOI

[30] J. S. Yang, J. Lee, C.-R. Chang, “Magnetostatic coupling in patterned spin valve structures”, IEEE Trans. Magn., 34 (1998), 2469–2472 | DOI

[31] R. P. Erickson, Kristl, B. Hathaway, J. R. Cullen, “Mechanism for non-Heisenberg-exchange coupling between ferromagnetic layers”, Phys. Rev. B, 47 (1993), 2626–2635 | DOI

[32] Z. Q. Qiu, J. E. Mattson et al., “Temperature dependence of the magnetization of superlattices with variable interlayer magnetic couplings”, Phys. Rev. B, 45 (1992), 2252–2257 | DOI

[33] D. M. Edwards, J. Mathon, R. B. Muniz, M. S. Phan, “Oscillations in the exchange coupling of ferromagnetic layers separated by a nonmagnetic metallic layer”, J. Phys.: Condens. Matter., 3 (1991), 4941–4958 | DOI