The f-electron ordering phenomena have been intensively studied in the past decades. Of special interest are systems with an unconventional type of the order parameter: quadrupolar or octupolar for instance, separately from the ordinary dipolar one. Light rare-earth hexaborides (RB6, R = Ce, Pr, Nd) provide an ideal playground for studying the competition between various types of multipole interactions. CeB6 is a heavy-fermion metal with a simple cubic crystal structure and has three zero-field phases: high temperature paramagnetic phase I; double-q AFM phase III and famous "hidden" antiferroquadrupolar (AFQ) phase II at intermediate temperatures between TN=2.3 K, TQ=3.2 K In the present experiment, we want to study magnetic structure of substituted cerium hexaborate Ce0.7Nd0.3B6 single crystal in AFM phases III, V and AFQ phase II applying magnetic field along [1-10] direction